diff --git a/components/switch/demos/beforeChange.md b/components/switch/demos/beforeChange.md
index f876c8f62..de11c6a77 100644
--- a/components/switch/demos/beforeChange.md
+++ b/components/switch/demos/beforeChange.md
@@ -22,6 +22,7 @@ import {Switch} from 'kpc';
 ```
 
 ```ts
+import { Message } from 'kpc';
 export default class extends Component {
     static template = template;
     static defaults() {
@@ -31,14 +32,16 @@ export default class extends Component {
         }
     }
 
-    beforeChange() {
+    beforeChange(value: any) {
         return new Promise<boolean>(resolve => {
+            Message.warning(`current value is ${value}`);
             setTimeout(() => {
                 resolve(true);
             }, 1000);
         });
     }
-    beforeChangeFalse() {
+    beforeChangeFalse(value: any) {
+        Message.warning(`current value is ${value}`);
         return new Promise<boolean>(resolve => {
             setTimeout(() => {
                 resolve(false);
diff --git a/components/switch/index.md b/components/switch/index.md
index 8ed670040..194e93c81 100644
--- a/components/switch/index.md
+++ b/components/switch/index.md
@@ -23,7 +23,7 @@ sidebar: doc
 | size | 尺寸 | `"large"` &#124; `"default"` &#124; `"small"` &#124; `"mini"` | `"default"` |
 | disabled | 控制禁用 | `boolean` | `false` |
 | loading | 开关loading属性 | `boolean` | `false` |
-| beforeChange | 切换`Switch`之前的拦截函数，如果该函数返回`false`则阻止本次切换，支持异步函数 | <code>() => boolean &#124; Promise&lt;boolean&gt;</code> | `undefined` |
+| beforeChange | 切换`Switch`之前的拦截函数，如果该函数返回`false`则阻止本次切换，支持异步函数, 参数为当前value | <code>(value: any) => boolean &#124; Promise&lt;boolean&gt;</code> | `undefined` |
 
 # 扩展点
 
diff --git a/components/switch/index.ts b/components/switch/index.ts
index 17ad838bd..82952a0f7 100644
--- a/components/switch/index.ts
+++ b/components/switch/index.ts
@@ -18,7 +18,7 @@ export interface SwitchProps<True = any, False = any> {
     size?: Sizes
     disabled?: boolean
     loading?: boolean
-    beforeChange?: () => boolean | Promise<boolean>;
+    beforeChange?: (value: True | False | undefined) => boolean | Promise<boolean>;
 }
 
 export interface SwitchEvents {
@@ -96,7 +96,7 @@ export class Switch<True = true, False = false> extends Component<SwitchProps<Tr
     }
 
     public async toggle(isKeypress: boolean) {
-        const {disabled, beforeChange} = this.get();
+        const {disabled, beforeChange, value} = this.get();
         if (disabled) return;
 
         // if is not keypress, we blur it to remove focus style
@@ -110,7 +110,7 @@ export class Switch<True = true, False = false> extends Component<SwitchProps<Tr
                 loading: true
             });
             try {
-                const ret = await beforeChange();
+                const ret = await beforeChange(value);
                 if (!ret) return;
             } finally {
                 this.set({