diff --git a/packages/vant-cli/site/desktop/components/Content.vue b/packages/vant-cli/site/desktop/components/Content.vue
index e1eb949af..7c53568fd 100644
--- a/packages/vant-cli/site/desktop/components/Content.vue
+++ b/packages/vant-cli/site/desktop/components/Content.vue
@@ -141,7 +141,7 @@ export default {
       font-size: 14px;
       font-family: @van-doc-code-font-family;
       font-style: normal;
-      max-width: 400px;
+      max-width: 300px;
       -webkit-font-smoothing: auto;
     }
   }
diff --git a/src/popup/Popup.tsx b/src/popup/Popup.tsx
index 343d4e5c3..f68196d64 100644
--- a/src/popup/Popup.tsx
+++ b/src/popup/Popup.tsx
@@ -16,6 +16,7 @@ import {
 // Utils
 import { popupSharedProps } from './shared';
 import { createNamespace, extend, isDef } from '../utils';
+import { callInterceptor, Interceptor } from '../utils/interceptor';
 
 // Composables
 import { useEventListener } from '@vant/use';
@@ -50,6 +51,7 @@ export default defineComponent({
     closeable: Boolean,
     transition: String,
     iconPrefix: String,
+    beforeClose: Function as PropType<Interceptor>,
     closeOnPopstate: Boolean,
     safeAreaInsetBottom: Boolean,
     position: {
@@ -115,11 +117,18 @@ export default defineComponent({
       }
     };
 
+    const triggerClose = () => {
+      opened = false;
+      emit('close');
+      emit('update:show', false);
+    };
+
     const close = () => {
       if (opened) {
-        opened = false;
-        emit('close');
-        emit('update:show', false);
+        callInterceptor({
+          interceptor: props.beforeClose,
+          done: triggerClose,
+        });
       }
     };
 
diff --git a/src/popup/README.md b/src/popup/README.md
index d9a6e83ef..d144fe3ad 100644
--- a/src/popup/README.md
+++ b/src/popup/README.md
@@ -136,6 +136,7 @@ export default {
 | closeable | Whether to show close icon | _boolean_ | `false` |
 | close-icon | Close icon name | _string_ | `cross` |
 | close-icon-position | Close Icon Position，can be set to `top-left` `bottom-left` `bottom-right` | _string_ | `top-right` |
+| before-close `v3.1.4` | Callback function before close | _(action: string) => boolean \| Promise\<boolean\>_ | - |
 | icon-prefix `v3.0.18` | Icon className prefix | _string_ | `van-icon` |
 | transition | Transition, equivalent to `name` prop of [transition](https://v3.vuejs.org/api/built-in-components.html#transition) | _string_ | - |
 | transition-appear | Whether to apply transition on initial render | _boolean_ | `false` |
diff --git a/src/popup/README.zh-CN.md b/src/popup/README.zh-CN.md
index 7067789c8..1d09c1564 100644
--- a/src/popup/README.zh-CN.md
+++ b/src/popup/README.zh-CN.md
@@ -140,6 +140,7 @@ export default {
 | closeable | 是否显示关闭图标 | _boolean_ | `false` |
 | close-icon | 关闭[图标名称](#/zh-CN/icon)或图片链接 | _string_ | `cross` |
 | close-icon-position | 关闭图标位置，可选值为 `top-left`<br>`bottom-left` `bottom-right` | _string_ | `top-right` |
+| before-close `v3.1.4` | 关闭前的回调函数，返回 `false` 可阻止关闭，支持返回 Promise | _(action: string) => boolean \| Promise\<boolean\>_ | - |
 | icon-prefix `v3.0.18` | 图标类名前缀，同 Icon 组件的 [class-prefix 属性](#/zh-CN/icon#props) | _string_ | `van-icon` |
 | transition | 动画类名，等价于 [transition](https://v3.cn.vuejs.org/api/built-in-components.html#transition) 的 `name` 属性 | _string_ | - |
 | transition-appear | 是否在初始渲染时启用过渡动画 | _boolean_ | `false` |
diff --git a/src/popup/test/index.spec.js b/src/popup/test/index.spec.js
index b914ab1f3..287c9dfe0 100644
--- a/src/popup/test/index.spec.js
+++ b/src/popup/test/index.spec.js
@@ -214,3 +214,19 @@ test('should render overlay-content slot correctly', () => {
 
   expect(wrapper.html()).toMatchSnapshot();
 });
+
+test('should allow to prevent close with before-close prop', async () => {
+  const wrapper = mount(Popup, {
+    props: {
+      show: true,
+      beforeClose: () => false,
+    },
+  });
+
+  await wrapper.find('.van-overlay').trigger('click');
+  expect(wrapper.emitted('update:show')).toBeFalsy();
+
+  await wrapper.setProps({ beforeClose: () => true });
+  await wrapper.find('.van-overlay').trigger('click');
+  expect(wrapper.emitted('update:show')[0]).toEqual([false]);
+});