diff --git a/components/dropdown/dropdown-button.tsx b/components/dropdown/dropdown-button.tsx
index 9f329522e7..896ee2b540 100644
--- a/components/dropdown/dropdown-button.tsx
+++ b/components/dropdown/dropdown-button.tsx
@@ -16,6 +16,7 @@ export interface DropdownButtonProps {
   onVisibleChange?: (visible: boolean) => void;
   style?: React.CSSProperties;
   prefixCls?: string;
+  children: any;
 }
 
 export default class DropdownButton extends React.Component<DropdownButtonProps, any> {
@@ -41,10 +42,10 @@ export default class DropdownButton extends React.Component<DropdownButtonProps,
     const cls = classNames(prefixCls, className);
 
     const dropdownProps = {
-       align,
-       overlay,
-       trigger: disabled ? [] : trigger,
-       onVisibleChange,
+      align,
+      overlay,
+      trigger: disabled ? [] : trigger,
+      onVisibleChange,
     };
 
     if ('visible' in this.props) {
diff --git a/components/dropdown/dropdown.tsx b/components/dropdown/dropdown.tsx
index c3800ae177..67c10fd0b3 100644
--- a/components/dropdown/dropdown.tsx
+++ b/components/dropdown/dropdown.tsx
@@ -1,5 +1,6 @@
-import React from 'react';
+import React, { cloneElement } from 'react';
 import RcDropdown from 'rc-dropdown';
+import classNames from 'classnames';
 
 export interface DropDownProps {
   trigger?: Array<'click' | 'hover'>;
@@ -9,6 +10,7 @@ export interface DropDownProps {
   visible?: boolean;
   align?: Object;
   getPopupContainer?: () => HTMLElement;
+  prefixCls?: string;
 }
 
 export default class Dropdown extends React.Component<DropDownProps, any> {
@@ -21,6 +23,14 @@ export default class Dropdown extends React.Component<DropDownProps, any> {
   };
 
   render() {
-    return <RcDropdown {...this.props} />;
+    const { children, prefixCls } = this.props;
+    const dropdownTrigger = cloneElement(children as any, {
+      className: classNames((children as any).props.className, `${prefixCls}-trigger`),
+    });
+    return (
+      <RcDropdown {...this.props}>
+        {dropdownTrigger}
+      </RcDropdown>
+    );
   }
 }
diff --git a/components/dropdown/style/index.less b/components/dropdown/style/index.less
index 007f2e4c19..50d6f3ebca 100644
--- a/components/dropdown/style/index.less
+++ b/components/dropdown/style/index.less
@@ -17,7 +17,7 @@
     position: relative;
 
     .@{ant-prefix}-btn > .@{iconfont-css-prefix}-down {
-      .iconfont-size-under-12px(9px);
+      .iconfont-size-under-12px(10px);
     }
 
     .@{iconfont-css-prefix}-down:before {
@@ -109,7 +109,7 @@
       content: "\e61f";
       right: 16px;
       color: @text-color-secondary;
-      .iconfont-size-under-12px(9px);
+      .iconfont-size-under-12px(10px);
     }
 
     &-submenu-vertical {
@@ -153,10 +153,11 @@
   }
 }
 
+.@{dropdown-prefix-cls}-trigger,
 .@{dropdown-prefix-cls}-link {
   font-size: @font-size-base;
   .@{iconfont-css-prefix}-down {
-    .iconfont-size-under-12px(9px);
+    .iconfont-size-under-12px(10px);
   }
 }
 
@@ -165,10 +166,6 @@
     padding-right: 7px;
   }
   .@{iconfont-css-prefix}-down {
-    .iconfont-size-under-12px(9px);
+    .iconfont-size-under-12px(10px);
   }
 }
-
-.ant-btn .anticon-down {
-  .iconfont-size-under-12px(9px);
-}