diff --git a/packages/vant-use/.vuepress/config.js b/packages/vant-use/.vuepress/config.js
index 687d3697c..e01abac89 100644
--- a/packages/vant-use/.vuepress/config.js
+++ b/packages/vant-use/.vuepress/config.js
@@ -30,7 +30,7 @@ module.exports = {
           '/src/useEventListener/',
           '/src/usePageVisibility/',
           '/src/useScrollParent/',
-          // '/src/useWindowSize/',
+          '/src/useWindowSize/',
         ],
       },
     ],
diff --git a/packages/vant-use/src/useWindowSize/README.md b/packages/vant-use/src/useWindowSize/README.md
new file mode 100644
index 000000000..ac90fd72d
--- /dev/null
+++ b/packages/vant-use/src/useWindowSize/README.md
@@ -0,0 +1,43 @@
+# useWindowSize
+
+获取浏览器窗口的视口宽度和高度，并在窗口大小变化时自动更新。
+
+## 代码演示
+
+### 基本用法
+
+```js
+import { watch } from 'vue';
+import { useWindowSize } from '@vant/use';
+
+export default {
+  setup() {
+    const { width, height } = useWindowSize();
+
+    console.log(width.value); // -> 窗口宽度
+    console.log(height.value); // -> 窗口高度
+
+    watch([width, height], () => {
+      console.log('window resized');
+    });
+  },
+};
+```
+
+## API
+
+### 类型定义
+
+```ts
+function useWindowSize(): {
+  width: Ref<number>;
+  height: Ref<number>;
+};
+```
+
+### 返回值
+
+| 参数   | 说明           | 类型           |
+| ------ | -------------- | -------------- |
+| width  | 浏览器窗口宽度 | _Ref\<number>_ |
+| height | 浏览器窗口高度 | _Ref\<number>_ |
diff --git a/packages/vant-use/src/useWindowSize/index.ts b/packages/vant-use/src/useWindowSize/index.ts
index ddaefce73..d5faa7d00 100644
--- a/packages/vant-use/src/useWindowSize/index.ts
+++ b/packages/vant-use/src/useWindowSize/index.ts
@@ -2,9 +2,9 @@ import { ref } from 'vue';
 import { inBrowser } from '../shared';
 import { useEventListener } from '../useEventListener';
 
-export function useWindowSize(initialWidth = 0, initialHeight = 0) {
-  const width = ref(inBrowser ? window.innerWidth : initialWidth);
-  const height = ref(inBrowser ? window.innerHeight : initialHeight);
+export function useWindowSize() {
+  const width = ref(inBrowser ? window.innerWidth : 0);
+  const height = ref(inBrowser ? window.innerHeight : 0);
 
   const onResize = () => {
     width.value = window.innerWidth;