diff --git a/components/form/demo/control-hooks.md b/components/form/demo/control-hooks.md
index 52cb53edd1..9b08f721cc 100644
--- a/components/form/demo/control-hooks.md
+++ b/components/form/demo/control-hooks.md
@@ -9,10 +9,14 @@ title:
 
 通过 `Form.useForm` 对表单数据域进行交互。
 
+> 注意 `useForm` 是 [React Hooks](https://reactjs.org/docs/hooks-intro.html) 的实现，只能用于函数组件，class 组件请查看下面的例子。
+
 ## en-US
 
 Call form method with `Form.useForm`.
 
+> Note that `useForm` is a [React Hooks](https://reactjs.org/docs/hooks-intro.html) that only works in functional component.
+
 ```tsx
 import { Form, Input, Button, Select } from 'antd';