diff --git a/components/select/demo/custom-dropdown-menu.md b/components/select/demo/custom-dropdown-menu.md
index e0ed7a91be..3b8e6e9ea8 100644
--- a/components/select/demo/custom-dropdown-menu.md
+++ b/components/select/demo/custom-dropdown-menu.md
@@ -7,11 +7,11 @@ title:
 
 ## zh-CN
 
-使用 `dropdownRender` 对下拉菜单进行自由扩展。
+使用 `dropdownRender` 对下拉菜单进行自由扩展。自定义内容点击时会关闭浮层，如果不喜欢关闭，可以添加 `onMouseDown={e => e.preventDefault()}` 进行阻止（更多详情见 [#13448](https://github.com/ant-design/ant-design/issues/13448)）。
 
 ## en-US
 
-Customize the dropdown menu via `dropdownRender`.
+Customize the dropdown menu via `dropdownRender`. Dropdown menu will be closed if click `dropdownRender` area, you can prevent it by wrapping `onMouseDown={e => e.preventDefault()}` (see more at [#13448](https://github.com/ant-design/ant-design/issues/13448)).
 
 ```jsx
 import React, { useState } from 'react';
diff --git a/components/select/index.en-US.md b/components/select/index.en-US.md
index 71961722a0..5638cf67d0 100644
--- a/components/select/index.en-US.md
+++ b/components/select/index.en-US.md
@@ -113,7 +113,7 @@ It's caused by option with different `label` and `value`. You can use `optionFil
 
 ### The dropdown is closed when click `dropdownRender` area?
 
-See the instruction in [dropdownRender example](#components-select-demo-custom-dropdown-menu).
+Dropdown menu will be closed if click `dropdownRender` area, you can prevent it by wrapping `onMouseDown={e => e.preventDefault()}` (see more at [#13448](https://github.com/ant-design/ant-design/issues/13448)).
 
 ### Why sometime customize Option cause scroll break?
 
diff --git a/components/select/index.zh-CN.md b/components/select/index.zh-CN.md
index a441cf1297..91cb942bf1 100644
--- a/components/select/index.zh-CN.md
+++ b/components/select/index.zh-CN.md
@@ -114,7 +114,7 @@ cover: https://gw.alipayobjects.com/zos/alicdn/_0XzgOis7/Select.svg
 
 ### 点击 `dropdownRender` 里的内容浮层关闭怎么办？
 
-看下 [dropdownRender 例子](#components-select-demo-custom-dropdown-menu) 里的说明。
+自定义内容点击时会关闭浮层，如果不喜欢关闭，可以添加 `onMouseDown={e => e.preventDefault()}` 进行阻止（更多详情见 [#13448](https://github.com/ant-design/ant-design/issues/13448)）。
 
 ### 自定义 Option 样式导致滚动异常怎么办？