diff --git a/components/dropdown/index.en-US.md b/components/dropdown/index.en-US.md
index 31d8c8cceb..fbc703e026 100644
--- a/components/dropdown/index.en-US.md
+++ b/components/dropdown/index.en-US.md
@@ -22,7 +22,7 @@ If there are too many operations to display, you can wrap them in a `Dropdown`.
 | overlayClassName | Class name of the dropdown root element | string | - |
 | overlayStyle | Style of the dropdown root element | object | - |
 | placement | placement of pop menu: `bottomLeft` `bottomCenter` `bottomRight` `topLeft` `topCenter` `topRight` | String | `bottomLeft` |
-| trigger | the trigger mode which executes the drop-down action | Array<`click`\|`hover`\|`contextMenu`> | `['hover']` |
+| trigger | the trigger mode which executes the drop-down action, hover doesn't work on mobile device | Array<`click`\|`hover`\|`contextMenu`> | `['hover']` |
 | visible | whether the dropdown menu is visible | boolean | - |
 | onVisibleChange | a callback function takes an argument: `visible`, is executed when the visible state is changed | Function(visible) | - |
 
diff --git a/components/dropdown/index.zh-CN.md b/components/dropdown/index.zh-CN.md
index 2d1399b44d..f24613fc14 100644
--- a/components/dropdown/index.zh-CN.md
+++ b/components/dropdown/index.zh-CN.md
@@ -23,7 +23,7 @@ title: Dropdown
 | overlayClassName | 下拉根元素的类名称 | string | - |
 | overlayStyle | 下拉根元素的样式 | object | - |
 | placement | 菜单弹出位置：`bottomLeft` `bottomCenter` `bottomRight` `topLeft` `topCenter` `topRight` | String | `bottomLeft` |
-| trigger | 触发下拉的行为 | Array<`click`\|`hover`\|`contextMenu`> | `['hover']` |
+| trigger | 触发下拉的行为, 移动端不支持 hover | Array<`click`\|`hover`\|`contextMenu`> | `['hover']` |
 | visible | 菜单是否显示 | boolean | - |
 | onVisibleChange | 菜单显示状态改变时调用，参数为 visible | Function(visible) | - |