diff --git a/components/layout/Sider.tsx b/components/layout/Sider.tsx
index b08f5188fb..b81e6eb339 100644
--- a/components/layout/Sider.tsx
+++ b/components/layout/Sider.tsx
@@ -17,6 +17,7 @@ if (typeof window !== 'undefined') {
 import React from 'react';
 import classNames from 'classnames';
 import omit from 'omit.js';
+import PropTypes from 'prop-types';
 import Icon from '../icon';
 
 const dimensionMap = {
@@ -55,6 +56,10 @@ export default class Sider extends React.Component<SiderProps, any> {
     style: {},
   };
 
+  static childContextTypes = {
+    siderCollapsed: PropTypes.bool,
+  };
+
   private mql: any;
 
   constructor(props) {
@@ -78,6 +83,12 @@ export default class Sider extends React.Component<SiderProps, any> {
     };
   }
 
+  getChildContext() {
+    return {
+      siderCollapsed: this.props.collapsed,
+    };
+  }
+
   componentWillReceiveProps(nextProps) {
     if ('collapsed' in nextProps) {
       this.setState({
diff --git a/components/layout/__tests__/__snapshots__/demo.test.js.snap b/components/layout/__tests__/__snapshots__/demo.test.js.snap
index 09746263f5..b2e4e75bf8 100644
--- a/components/layout/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/layout/__tests__/__snapshots__/demo.test.js.snap
@@ -139,7 +139,7 @@ exports[`renders ./components/layout/demo/custom-trigger.md correctly 1`] = `
       />
       <ul
         aria-activedescendant=""
-        class="ant-menu ant-menu-inline  ant-menu-dark ant-menu-root"
+        class="ant-menu ant-menu-inline ant-menu-dark ant-menu-root"
         role="menu"
         tabindex="0"
       >
@@ -152,9 +152,7 @@ exports[`renders ./components/layout/demo/custom-trigger.md correctly 1`] = `
           <i
             class="anticon anticon-user"
           />
-          <span
-            class="nav-text"
-          >
+          <span>
             nav 1
           </span>
         </li>
@@ -167,9 +165,7 @@ exports[`renders ./components/layout/demo/custom-trigger.md correctly 1`] = `
           <i
             class="anticon anticon-video-camera"
           />
-          <span
-            class="nav-text"
-          >
+          <span>
             nav 2
           </span>
         </li>
@@ -182,9 +178,7 @@ exports[`renders ./components/layout/demo/custom-trigger.md correctly 1`] = `
           <i
             class="anticon anticon-upload"
           />
-          <span
-            class="nav-text"
-          >
+          <span>
             nav 3
           </span>
         </li>
@@ -225,7 +219,7 @@ exports[`renders ./components/layout/demo/fixed.md correctly 1`] = `
     />
     <ul
       aria-activedescendant=""
-      class="ant-menu ant-menu-horizontal  ant-menu-dark ant-menu-root"
+      class="ant-menu ant-menu-horizontal ant-menu-dark ant-menu-root"
       role="menu"
       style="line-height:64px;"
       tabindex="0"
@@ -330,7 +324,7 @@ exports[`renders ./components/layout/demo/fixed-sider.md correctly 1`] = `
       />
       <ul
         aria-activedescendant=""
-        class="ant-menu ant-menu-inline  ant-menu-dark ant-menu-root"
+        class="ant-menu ant-menu-inline ant-menu-dark ant-menu-root"
         role="menu"
         tabindex="0"
       >
@@ -594,7 +588,7 @@ exports[`renders ./components/layout/demo/responsive.md correctly 1`] = `
       />
       <ul
         aria-activedescendant=""
-        class="ant-menu ant-menu-inline  ant-menu-dark ant-menu-root"
+        class="ant-menu ant-menu-inline ant-menu-dark ant-menu-root"
         role="menu"
         tabindex="0"
       >
@@ -704,10 +698,36 @@ exports[`renders ./components/layout/demo/side.md correctly 1`] = `
       />
       <ul
         aria-activedescendant=""
-        class="ant-menu ant-menu-inline  ant-menu-dark ant-menu-root"
+        class="ant-menu ant-menu-inline ant-menu-dark ant-menu-root"
         role="menu"
         tabindex="0"
       >
+        <li
+          aria-selected="true"
+          class="ant-menu-item-selected ant-menu-item"
+          role="menuitem"
+          style="padding-left:24px;"
+        >
+          <i
+            class="anticon anticon-pie-chart"
+          />
+          <span>
+            Option 1
+          </span>
+        </li>
+        <li
+          aria-selected="false"
+          class="ant-menu-item"
+          role="menuitem"
+          style="padding-left:24px;"
+        >
+          <i
+            class="anticon anticon-desktop"
+          />
+          <span>
+            Option 2
+          </span>
+        </li>
         <li
           class="ant-menu-submenu-inline ant-menu-submenu"
         >
@@ -722,9 +742,7 @@ exports[`renders ./components/layout/demo/side.md correctly 1`] = `
               <i
                 class="anticon anticon-user"
               />
-              <span
-                class="nav-text"
-              >
+              <span>
                 User
               </span>
             </span>
@@ -744,29 +762,23 @@ exports[`renders ./components/layout/demo/side.md correctly 1`] = `
               <i
                 class="anticon anticon-team"
               />
-              <span
-                class="nav-text"
-              >
+              <span>
                 Team
               </span>
             </span>
           </div>
         </li>
         <li
-          aria-selected="true"
-          class="ant-menu-item-selected ant-menu-item"
+          aria-selected="false"
+          class="ant-menu-item"
           role="menuitem"
           style="padding-left:24px;"
         >
+          <i
+            class="anticon anticon-file"
+          />
           <span>
-            <i
-              class="anticon anticon-file"
-            />
-            <span
-              class="nav-text"
-            >
-              File
-            </span>
+            File
           </span>
         </li>
       </ul>
@@ -847,7 +859,7 @@ exports[`renders ./components/layout/demo/top.md correctly 1`] = `
     />
     <ul
       aria-activedescendant=""
-      class="ant-menu ant-menu-horizontal  ant-menu-dark ant-menu-root"
+      class="ant-menu ant-menu-horizontal ant-menu-dark ant-menu-root"
       role="menu"
       style="line-height:64px;"
       tabindex="0"
@@ -947,7 +959,7 @@ exports[`renders ./components/layout/demo/top-side.md correctly 1`] = `
     />
     <ul
       aria-activedescendant=""
-      class="ant-menu ant-menu-horizontal  ant-menu-dark ant-menu-root"
+      class="ant-menu ant-menu-horizontal ant-menu-dark ant-menu-root"
       role="menu"
       style="line-height:64px;"
       tabindex="0"
@@ -1033,13 +1045,13 @@ exports[`renders ./components/layout/demo/top-side.md correctly 1`] = `
         >
           <ul
             aria-activedescendant=""
-            class="ant-menu ant-menu-inline  ant-menu-light ant-menu-root"
+            class="ant-menu ant-menu-inline ant-menu-light ant-menu-root"
             role="menu"
             style="height:100%;"
             tabindex="0"
           >
             <li
-              class="ant-menu-submenu-inline ant-menu-submenu-open ant-menu-submenu-selected ant-menu-submenu"
+              class="ant-menu-submenu-inline ant-menu-submenu-open ant-menu-submenu"
             >
               <div
                 aria-expanded="true"
@@ -1163,7 +1175,7 @@ exports[`renders ./components/layout/demo/top-side-2.md correctly 1`] = `
     />
     <ul
       aria-activedescendant=""
-      class="ant-menu ant-menu-horizontal  ant-menu-dark ant-menu-root"
+      class="ant-menu ant-menu-horizontal ant-menu-dark ant-menu-root"
       role="menu"
       style="line-height:64px;"
       tabindex="0"
@@ -1203,13 +1215,13 @@ exports[`renders ./components/layout/demo/top-side-2.md correctly 1`] = `
       >
         <ul
           aria-activedescendant=""
-          class="ant-menu ant-menu-inline  ant-menu-light ant-menu-root"
+          class="ant-menu ant-menu-inline ant-menu-light ant-menu-root"
           role="menu"
           style="height:100%;border-right:0;"
           tabindex="0"
         >
           <li
-            class="ant-menu-submenu-inline ant-menu-submenu-open ant-menu-submenu-selected ant-menu-submenu"
+            class="ant-menu-submenu-inline ant-menu-submenu-open ant-menu-submenu"
           >
             <div
               aria-expanded="true"
diff --git a/components/layout/demo/custom-trigger.md b/components/layout/demo/custom-trigger.md
index f30a6b3a49..e059ed7f31 100644
--- a/components/layout/demo/custom-trigger.md
+++ b/components/layout/demo/custom-trigger.md
@@ -38,15 +38,15 @@ class SiderDemo extends React.Component {
           <Menu theme="dark" mode="inline" defaultSelectedKeys={['1']}>
             <Menu.Item key="1">
               <Icon type="user" />
-              <span className="nav-text">nav 1</span>
+              <span>nav 1</span>
             </Menu.Item>
             <Menu.Item key="2">
               <Icon type="video-camera" />
-              <span className="nav-text">nav 2</span>
+              <span>nav 2</span>
             </Menu.Item>
             <Menu.Item key="3">
               <Icon type="upload" />
-              <span className="nav-text">nav 3</span>
+              <span>nav 3</span>
             </Menu.Item>
           </Menu>
         </Sider>
@@ -89,12 +89,4 @@ ReactDOM.render(<SiderDemo />, mountNode);
   border-radius: 6px;
   margin: 16px;
 }
-
-#components-layout-demo-custom-trigger .ant-layout-sider-collapsed .anticon {
-  font-size: 16px;
-}
-
-#components-layout-demo-custom-trigger .ant-layout-sider-collapsed .nav-text {
-  display: none;
-}
 ````
diff --git a/components/layout/demo/side.md b/components/layout/demo/side.md
index b57aa02871..b714531b08 100644
--- a/components/layout/demo/side.md
+++ b/components/layout/demo/side.md
@@ -27,14 +27,10 @@ const SubMenu = Menu.SubMenu;
 class SiderDemo extends React.Component {
   state = {
     collapsed: false,
-    mode: 'inline',
   };
   onCollapse = (collapsed) => {
     console.log(collapsed);
-    this.setState({
-      collapsed,
-      mode: collapsed ? 'vertical' : 'inline',
-    });
+    this.setState({ collapsed });
   }
   render() {
     return (
@@ -45,27 +41,33 @@ class SiderDemo extends React.Component {
           onCollapse={this.onCollapse}
         >
           <div className="logo" />
-          <Menu theme="dark" mode={this.state.mode} defaultSelectedKeys={['6']}>
+          <Menu theme="dark" defaultSelectedKeys={['1']} mode="inline">
+            <Menu.Item key="1">
+              <Icon type="pie-chart" />
+              <span>Option 1</span>
+            </Menu.Item>
+            <Menu.Item key="2">
+              <Icon type="desktop" />
+              <span>Option 2</span>
+            </Menu.Item>
             <SubMenu
               key="sub1"
-              title={<span><Icon type="user" /><span className="nav-text">User</span></span>}
+              title={<span><Icon type="user" /><span>User</span></span>}
             >
-              <Menu.Item key="1">Tom</Menu.Item>
-              <Menu.Item key="2">Bill</Menu.Item>
-              <Menu.Item key="3">Alex</Menu.Item>
+              <Menu.Item key="3">Tom</Menu.Item>
+              <Menu.Item key="4">Bill</Menu.Item>
+              <Menu.Item key="5">Alex</Menu.Item>
             </SubMenu>
             <SubMenu
               key="sub2"
-              title={<span><Icon type="team" /><span className="nav-text">Team</span></span>}
+              title={<span><Icon type="team" /><span>Team</span></span>}
             >
-              <Menu.Item key="4">Team 1</Menu.Item>
-              <Menu.Item key="5">Team 2</Menu.Item>
+              <Menu.Item key="6">Team 1</Menu.Item>
+              <Menu.Item key="8">Team 2</Menu.Item>
             </SubMenu>
-            <Menu.Item key="6">
-              <span>
-                <Icon type="file" />
-                <span className="nav-text">File</span>
-              </span>
+            <Menu.Item key="8">
+              <Icon type="file" />
+              <span>File</span>
             </Menu.Item>
           </Menu>
         </Sider>
@@ -99,17 +101,4 @@ ReactDOM.render(<SiderDemo />, mountNode);
   border-radius: 6px;
   margin: 16px;
 }
-
-#components-layout-demo-side .ant-layout-sider-collapsed .anticon {
-  font-size: 16px;
-  margin-left: 8px;
-}
-
-#components-layout-demo-side .ant-layout-sider-collapsed .nav-text {
-  display: none;
-}
-
-#components-layout-demo-side .ant-layout-sider-collapsed .ant-menu-submenu-vertical > .ant-menu-submenu-title:after {
-  display: none;
-}
 ````
diff --git a/components/menu/MenuItem.tsx b/components/menu/MenuItem.tsx
new file mode 100644
index 0000000000..9d57ae8b16
--- /dev/null
+++ b/components/menu/MenuItem.tsx
@@ -0,0 +1,22 @@
+import React from 'react';
+import { Item } from 'rc-menu';
+import PropTypes from 'prop-types';
+import Tooltip from '../tooltip';
+
+const MenuItem: any = (props, { inlineCollapsed }) => {
+  return (
+    <Tooltip
+      title={inlineCollapsed && props.level === 1 ? props.children : ''}
+      placement="right"
+      overlayClassName={`${props.rootPrefixCls}-inline-collapsed-tooltip`}
+    >
+      <Item {...props} />
+    </Tooltip>
+  );
+};
+
+MenuItem.contextTypes = {
+  inlineCollapsed: PropTypes.bool,
+};
+
+export default MenuItem;
diff --git a/components/menu/__tests__/__snapshots__/demo.test.js.snap b/components/menu/__tests__/__snapshots__/demo.test.js.snap
index 191f34d012..697eb50aae 100644
--- a/components/menu/__tests__/__snapshots__/demo.test.js.snap
+++ b/components/menu/__tests__/__snapshots__/demo.test.js.snap
@@ -3,7 +3,7 @@
 exports[`renders ./components/menu/demo/horizontal.md correctly 1`] = `
 <ul
   aria-activedescendant=""
-  class="ant-menu ant-menu-horizontal  ant-menu-light ant-menu-root"
+  class="ant-menu ant-menu-horizontal ant-menu-light ant-menu-root"
   role="menu"
   tabindex="0"
 >
@@ -61,16 +61,16 @@ exports[`renders ./components/menu/demo/horizontal.md correctly 1`] = `
 </ul>
 `;
 
-exports[`renders ./components/menu/demo/sider.md correctly 1`] = `
+exports[`renders ./components/menu/demo/inline.md correctly 1`] = `
 <ul
   aria-activedescendant=""
-  class="ant-menu ant-menu-inline  ant-menu-light ant-menu-root"
+  class="ant-menu ant-menu-inline ant-menu-light ant-menu-root"
   role="menu"
   style="width:240px;"
   tabindex="0"
 >
   <li
-    class="ant-menu-submenu-inline ant-menu-submenu-open ant-menu-submenu-selected ant-menu-submenu"
+    class="ant-menu-submenu-inline ant-menu-submenu-open ant-menu-submenu"
   >
     <div
       aria-expanded="true"
@@ -197,16 +197,157 @@ exports[`renders ./components/menu/demo/sider.md correctly 1`] = `
 </ul>
 `;
 
+exports[`renders ./components/menu/demo/inline-collapsed.md correctly 1`] = `
+<div
+  style="width:240px;"
+>
+  <button
+    class="ant-btn ant-btn-primary"
+    style="margin-bottom:16px;"
+    type="button"
+  >
+    <i
+      class="anticon anticon-menu-fold"
+    />
+  </button>
+  <ul
+    aria-activedescendant=""
+    class="ant-menu ant-menu-inline ant-menu-dark ant-menu-root"
+    role="menu"
+    tabindex="0"
+  >
+    <li
+      aria-selected="true"
+      class="ant-menu-item-selected ant-menu-item"
+      role="menuitem"
+      style="padding-left:24px;"
+    >
+      <i
+        class="anticon anticon-pie-chart"
+      />
+      <span>
+        Option 1
+      </span>
+    </li>
+    <li
+      aria-selected="false"
+      class="ant-menu-item"
+      role="menuitem"
+      style="padding-left:24px;"
+    >
+      <i
+        class="anticon anticon-desktop"
+      />
+      <span>
+        Option 2
+      </span>
+    </li>
+    <li
+      aria-selected="false"
+      class="ant-menu-item"
+      role="menuitem"
+      style="padding-left:24px;"
+    >
+      <i
+        class="anticon anticon-inbox"
+      />
+      <span>
+        Option 3
+      </span>
+    </li>
+    <li
+      class="ant-menu-submenu-inline ant-menu-submenu-open ant-menu-submenu"
+    >
+      <div
+        aria-expanded="true"
+        aria-haspopup="true"
+        aria-owns="sub1$Menu"
+        class="ant-menu-submenu-title"
+        style="padding-left:24px;"
+      >
+        <span>
+          <i
+            class="anticon anticon-mail"
+          />
+          <span>
+            Navigation One
+          </span>
+        </span>
+      </div>
+      <ul
+        aria-activedescendant=""
+        class="ant-menu ant-menu-inline  ant-menu-sub"
+        id="sub1$Menu"
+        role="menu"
+      >
+        <li
+          aria-selected="false"
+          class="ant-menu-item"
+          role="menuitem"
+          style="padding-left:48px;"
+        >
+          Option 5
+        </li>
+        <li
+          aria-selected="false"
+          class="ant-menu-item"
+          role="menuitem"
+          style="padding-left:48px;"
+        >
+          Option 6
+        </li>
+        <li
+          aria-selected="false"
+          class="ant-menu-item"
+          role="menuitem"
+          style="padding-left:48px;"
+        >
+          Option 7
+        </li>
+        <li
+          aria-selected="false"
+          class="ant-menu-item"
+          role="menuitem"
+          style="padding-left:48px;"
+        >
+          Option 8
+        </li>
+      </ul>
+    </li>
+    <li
+      class="ant-menu-submenu-inline ant-menu-submenu"
+    >
+      <div
+        aria-expanded="false"
+        aria-haspopup="true"
+        aria-owns="sub2$Menu"
+        class="ant-menu-submenu-title"
+        style="padding-left:24px;"
+      >
+        <span>
+          <i
+            class="anticon anticon-appstore"
+          />
+          <span>
+            Navigation Two
+          </span>
+        </span>
+      </div>
+    </li>
+  </ul>
+</div>
+`;
+
 exports[`renders ./components/menu/demo/sider-current.md correctly 1`] = `
 <ul
   aria-activedescendant=""
-  class="ant-menu ant-menu-inline  ant-menu-light ant-menu-root"
+  class="ant-menu ant-menu-inline ant-menu-light ant-menu-root"
   role="menu"
   style="width:240px;"
   tabindex="0"
 >
   <li
-    class="ant-menu-submenu-inline ant-menu-submenu-selected ant-menu-submenu"
+    class="ant-menu-submenu-inline ant-menu-submenu"
   >
     <div
       aria-expanded="false"
@@ -296,7 +437,7 @@ exports[`renders ./components/menu/demo/switch-mode.md correctly 1`] = `
   <br />
   <ul
     aria-activedescendant=""
-    class="ant-menu ant-menu-inline  ant-menu-light ant-menu-root"
+    class="ant-menu ant-menu-inline ant-menu-light ant-menu-root"
     role="menu"
     style="width:240px;"
     tabindex="0"
@@ -420,13 +561,13 @@ exports[`renders ./components/menu/demo/theme.md correctly 1`] = `
   <br />
   <ul
     aria-activedescendant=""
-    class="ant-menu ant-menu-inline  ant-menu-dark ant-menu-root"
+    class="ant-menu ant-menu-inline ant-menu-dark ant-menu-root"
     role="menu"
     style="width:240px;"
     tabindex="0"
   >
     <li
-      class="ant-menu-submenu-inline ant-menu-submenu-open ant-menu-submenu-selected ant-menu-submenu"
+      class="ant-menu-submenu-inline ant-menu-submenu-open ant-menu-submenu"
     >
       <div
         aria-expanded="true"
@@ -531,7 +672,7 @@ exports[`renders ./components/menu/demo/theme.md correctly 1`] = `
 exports[`renders ./components/menu/demo/vertical.md correctly 1`] = `
 <ul
   aria-activedescendant=""
-  class="ant-menu ant-menu-vertical  ant-menu-light ant-menu-root"
+  class="ant-menu ant-menu-vertical ant-menu-light ant-menu-root"
   role="menu"
   style="width:240px;"
   tabindex="0"
diff --git a/components/menu/__tests__/index.test.js b/components/menu/__tests__/index.test.js
index 3331ec21fc..357f4755d5 100644
--- a/components/menu/__tests__/index.test.js
+++ b/components/menu/__tests__/index.test.js
@@ -1,6 +1,7 @@
 import React from 'react';
 import { mount } from 'enzyme';
 import Menu from '..';
+import Icon from '../../icon';
 
 const SubMenu = Menu.SubMenu;
 
@@ -127,4 +128,31 @@ describe('Menu', () => {
     wrapper.setProps({ mode: 'inline' });
     expect(wrapper.find('.ant-menu-sub').at(0).hasClass('ant-menu-hidden')).not.toBe(true);
   });
+
+  it('should always follow openKeys when mode is switched', () => {
+    const wrapper = mount(
+      <Menu defaultOpenKeys={['1']} mode="inline">
+        <Menu.Item key="menu1">
+          <Icon type="inbox" />
+          <span>Option</span>
+        </Menu.Item>
+        <SubMenu key="1" title="submenu1">
+          <Menu.Item key="submenu1">
+            Option
+          </Menu.Item>
+          <Menu.Item key="submenu2">
+            Option
+          </Menu.Item>
+        </SubMenu>
+      </Menu>
+    );
+    expect(wrapper.find('.ant-menu-sub').at(0).hasClass('ant-menu-inline')).toBe(true);
+    expect(wrapper.find('.ant-menu-sub').at(0).hasClass('ant-menu-hidden')).toBe(false);
+    wrapper.setProps({ inlineCollapsed: true });
+    expect(wrapper.find('.ant-menu-sub').at(0).hasClass('ant-menu-vertical')).toBe(true);
+    expect(wrapper.find('.ant-menu-sub').at(0).hasClass('ant-menu-hidden')).toBe(true);
+    wrapper.setProps({ inlineCollapsed: false });
+    expect(wrapper.find('.ant-menu-sub').at(0).hasClass('ant-menu-inline')).toBe(true);
+    expect(wrapper.find('.ant-menu-sub').at(0).hasClass('ant-menu-hidden')).toBe(false);
+  });
 });
diff --git a/components/menu/demo/inline-collapsed.md b/components/menu/demo/inline-collapsed.md
new file mode 100644
index 0000000000..b3fa954104
--- /dev/null
+++ b/components/menu/demo/inline-collapsed.md
@@ -0,0 +1,75 @@
+---
+order: 2
+title:
+  zh-CN: 缩起内嵌菜单
+  en-US: Collapsed inline menu
+---
+
+## zh-CN
+
+内嵌菜单可以被缩起/展开。
+
+## en-US
+
+Inline menu could be collapsed.
+
+````jsx
+import { Menu, Icon, Button } from 'antd';
+const SubMenu = Menu.SubMenu;
+
+class App extends React.Component {
+  state = {
+    collapsed: false,
+  }
+  toggleCollapsed = () => {
+    this.setState({
+      collapsed: !this.state.collapsed,
+    });
+  }
+  render() {
+    return (
+      <div style={{ width: 240 }}>
+        <Button type="primary" onClick={this.toggleCollapsed} style={{ marginBottom: 16 }}>
+          <Icon type={this.state.collapsed ? 'menu-unfold' : 'menu-fold'} />
+        </Button>
+        <Menu
+          defaultSelectedKeys={['1']}
+          defaultOpenKeys={['sub1']}
+          mode="inline"
+          theme="dark"
+          inlineCollapsed={this.state.collapsed}
+        >
+          <Menu.Item key="1">
+            <Icon type="pie-chart" />
+            <span>Option 1</span>
+          </Menu.Item>
+          <Menu.Item key="2">
+            <Icon type="desktop" />
+            <span>Option 2</span>
+          </Menu.Item>
+          <Menu.Item key="3">
+            <Icon type="inbox" />
+            <span>Option 3</span>
+          </Menu.Item>
+          <SubMenu key="sub1" title={<span><Icon type="mail" /><span>Navigation One</span></span>}>
+            <Menu.Item key="5">Option 5</Menu.Item>
+            <Menu.Item key="6">Option 6</Menu.Item>
+            <Menu.Item key="7">Option 7</Menu.Item>
+            <Menu.Item key="8">Option 8</Menu.Item>
+          </SubMenu>
+          <SubMenu key="sub2" title={<span><Icon type="appstore" /><span>Navigation Two</span></span>}>
+            <Menu.Item key="9">Option 9</Menu.Item>
+            <Menu.Item key="10">Option 10</Menu.Item>
+            <SubMenu key="sub3" title="Submenu">
+              <Menu.Item key="11">Option 11</Menu.Item>
+              <Menu.Item key="12">Option 12</Menu.Item>
+            </SubMenu>
+          </SubMenu>
+        </Menu>
+      </div>
+    );
+  }
+}
+
+ReactDOM.render(<App />, mountNode);
+````
diff --git a/components/menu/demo/sider.md b/components/menu/demo/inline.md
similarity index 97%
rename from components/menu/demo/sider.md
rename to components/menu/demo/inline.md
index 7294441fff..d66ad98f5f 100755
--- a/components/menu/demo/sider.md
+++ b/components/menu/demo/inline.md
@@ -2,7 +2,7 @@
 order: 1
 title:
   zh-CN: 内嵌菜单
-  en-US: Vertical menu with inline children
+  en-US: Inline menu
 ---
 
 ## zh-CN
diff --git a/components/menu/index.en-US.md b/components/menu/index.en-US.md
index 69e60fb504..1e89bf0c00 100644
--- a/components/menu/index.en-US.md
+++ b/components/menu/index.en-US.md
@@ -42,6 +42,7 @@ More layout and samples: [layout](/docs/spec/layout).
 | style | style of the root node | object | |
 | inlineIndent | indent px of inline menu item on each level | number | 24 |
 | multiple | Allow select multiple item | boolean | false |
+| inlineCollapsed | specified the collapsed status when menu is inline mode | boolean | - |
 
 > More options in [rc-menu](https://github.com/react-component/menu#api)
 
diff --git a/components/menu/index.tsx b/components/menu/index.tsx
index c3c7c0c47b..ae5d4a1b7f 100644
--- a/components/menu/index.tsx
+++ b/components/menu/index.tsx
@@ -1,7 +1,10 @@
 import React from 'react';
-import RcMenu, { Item, Divider, SubMenu, ItemGroup } from 'rc-menu';
+import RcMenu, { Divider, SubMenu, ItemGroup } from 'rc-menu';
+import PropTypes from 'prop-types';
+import classNames from 'classnames';
 import animation from '../_util/openAnimation';
 import warning from '../_util/warning';
+import Item from './MenuItem';
 
 export interface SelectParam {
   key: string;
@@ -39,6 +42,7 @@ export interface MenuProps {
   prefixCls?: string;
   multiple?: boolean;
   inlineIndent?: number;
+  inlineCollapsed?: boolean;
 }
 
 export default class Menu extends React.Component<MenuProps, any> {
@@ -51,7 +55,14 @@ export default class Menu extends React.Component<MenuProps, any> {
     className: '',
     theme: 'light',  // or dark
   };
+  static childContextTypes = {
+    inlineCollapsed: PropTypes.bool,
+  };
+  static contextTypes = {
+    siderCollapsed: PropTypes.bool,
+  };
   switchModeFromInline: boolean;
+  inlineOpenKeys = [];
   constructor(props) {
     super(props);
 
@@ -61,6 +72,11 @@ export default class Menu extends React.Component<MenuProps, any> {
       'see: http://u.ant.design/menu-on-open-change.',
     );
 
+    warning(
+      !('inlineCollapsed' in props && props.mode !== 'inline'),
+      '`inlineCollapsed` should only be used when Menu\'s `mode` is inline.',
+    );
+
     let openKeys;
     if ('defaultOpenKeys' in props) {
       openKeys = props.defaultOpenKeys;
@@ -72,11 +88,27 @@ export default class Menu extends React.Component<MenuProps, any> {
       openKeys: openKeys || [],
     };
   }
-  componentWillReceiveProps(nextProps) {
+  getChildContext() {
+    return {
+      inlineCollapsed: this.getInlineCollapsed(),
+    };
+  }
+  componentWillReceiveProps(nextProps, nextContext) {
     if (this.props.mode === 'inline' &&
         nextProps.mode !== 'inline') {
       this.switchModeFromInline = true;
     }
+    if ((nextProps.inlineCollapsed && !this.props.inlineCollapsed) ||
+        (nextContext.siderCollapsed && !this.context.siderCollapsed)) {
+      this.switchModeFromInline = true;
+      this.inlineOpenKeys = this.state.openKeys;
+      this.setOpenKeys([]);
+    }
+    if ((!nextProps.inlineCollapsed && this.props.inlineCollapsed) ||
+        (!nextContext.siderCollapsed && this.context.siderCollapsed)) {
+      this.setOpenKeys(this.inlineOpenKeys);
+      this.inlineOpenKeys = [];
+    }
     if ('openKeys' in nextProps) {
       this.setState({ openKeys: nextProps.openKeys });
     }
@@ -102,48 +134,68 @@ export default class Menu extends React.Component<MenuProps, any> {
       this.setState({ openKeys });
     }
   }
-  render() {
-    let openAnimation = this.props.openAnimation || this.props.openTransitionName;
-    if (this.props.openAnimation === undefined && this.props.openTransitionName === undefined) {
-      switch (this.props.mode) {
+  getRealMenuMode() {
+    const { mode } = this.props;
+    return this.getInlineCollapsed() ? 'vertical' : mode;
+  }
+  getInlineCollapsed() {
+    const { inlineCollapsed } = this.props;
+    if (this.context.siderCollapsed !== undefined) {
+      return this.context.siderCollapsed;
+    }
+    return inlineCollapsed;
+  }
+  getMenuOpenAnimation() {
+    const { openAnimation, openTransitionName } = this.props;
+    const menuMode = this.getRealMenuMode();
+    let menuOpenAnimation = openAnimation || openTransitionName;
+    if (openAnimation === undefined && openTransitionName === undefined) {
+      switch (menuMode) {
         case 'horizontal':
-          openAnimation = 'slide-up';
+          menuOpenAnimation = 'slide-up';
           break;
         case 'vertical':
           // When mode switch from inline
           // submenu should hide without animation
           if (this.switchModeFromInline) {
-            openAnimation = '';
+            menuOpenAnimation = '';
             this.switchModeFromInline = false;
           } else {
-            openAnimation = 'zoom-big';
+            menuOpenAnimation = 'zoom-big';
           }
           break;
         case 'inline':
-          openAnimation = animation;
+          menuOpenAnimation = animation;
           break;
         default:
       }
     }
+    return menuOpenAnimation;
+  }
+  render() {
+    const { prefixCls, className, theme } = this.props;
+    const menuMode = this.getRealMenuMode();
+    const menuOpenAnimation = this.getMenuOpenAnimation();
 
-    let props = {};
-    const className = `${this.props.className} ${this.props.prefixCls}-${this.props.theme}`;
-    if (this.props.mode !== 'inline') {
-      // There is this.state.openKeys for
+    const menuClassName = classNames(className, `${prefixCls}-${theme}`, {
+      [`${prefixCls}-inline-collapsed`]: this.getInlineCollapsed(),
+    });
+
+    const menuProps: MenuProps = {
+      openKeys: this.state.openKeys,
+      onOpenChange: this.handleOpenChange,
+      className: menuClassName,
+      mode: menuMode,
+    };
+
+    if (menuMode !== 'inline') {
       // closing vertical popup submenu after click it
-      props = {
-        openKeys: this.state.openKeys,
-        onClick: this.handleClick,
-        onOpenChange: this.handleOpenChange,
-        openTransitionName: openAnimation,
-        className,
-      };
+      menuProps.onClick = this.handleClick;
+      menuProps.openTransitionName = menuOpenAnimation;
     } else {
-      props = {
-        openAnimation,
-        className,
-      };
+      menuProps.openAnimation = menuOpenAnimation;
     }
-    return <RcMenu {...this.props} {...props} />;
+
+    return <RcMenu {...this.props} {...menuProps} />;
   }
 }
diff --git a/components/menu/index.zh-CN.md b/components/menu/index.zh-CN.md
index 002aa62f03..3947293fe4 100644
--- a/components/menu/index.zh-CN.md
+++ b/components/menu/index.zh-CN.md
@@ -42,6 +42,7 @@ subtitle: 导航菜单
 | style | 根节点样式 | object | |
 | inlineIndent | inline 模式的菜单缩进宽度 | number | 24 |
 | multiple | 是否允许多选 | boolean | false |
+| inlineCollapsed | inline 时菜单是否收起状态 | boolean | - |
 
 > More options in [rc-menu](https://github.com/react-component/menu#api)
 
diff --git a/components/menu/style/index.less b/components/menu/style/index.less
index b9c6234006..8cc678d938 100644
--- a/components/menu/style/index.less
+++ b/components/menu/style/index.less
@@ -158,6 +158,8 @@
   }
 
   &-inline {
+    width: 100%;
+    transition: width .24s;
     .@{menu-prefix-cls}-selected,
     .@{menu-prefix-cls}-item-selected {
       &:after {
@@ -166,6 +168,37 @@
     }
   }
 
+  &-inline-collapsed {
+    width: 64px;
+    transition: all .3s;
+    > .@{menu-prefix-cls}-item,
+    > .@{menu-prefix-cls}-submenu > .@{menu-prefix-cls}-submenu-title {
+      text-align: center;
+      left: 0;
+      &:after {
+        display: none;
+      }
+    }
+    .@{menu-prefix-cls}-item,
+    .@{menu-prefix-cls}-submenu-title {
+      padding: 0;
+      .@{iconfont-css-prefix} {
+        font-size: 16px;
+        line-height: 42px;
+        margin: 0;
+        + span {
+          max-width: 0;
+          visibility: hidden;
+        }
+      }
+    }
+    &-tooltip {
+      .@{iconfont-css-prefix} {
+        display: none;
+      }
+    }
+  }
+
   &-submenu-horizontal > & {
     top: 100%;
     left: 0;
@@ -199,6 +232,15 @@
     .@{iconfont-css-prefix} {
       min-width: 14px;
       margin-right: 8px;
+      transition: all .3s;
+      vertical-align: middle;
+      + span {
+        max-width: 100%;
+        display: inline-block;
+        overflow: hidden;
+        transition: all .3s;
+        vertical-align: middle;
+      }
     }
   }
 
diff --git a/components/menu/style/index.tsx b/components/menu/style/index.tsx
index 3a3ab0de59..7bd39f61bf 100644
--- a/components/menu/style/index.tsx
+++ b/components/menu/style/index.tsx
@@ -1,2 +1,5 @@
 import '../../style/index.less';
 import './index.less';
+
+// style dependencies
+import '../../tooltip/style';