diff --git a/packages/overlay/README.md b/packages/overlay/README.md
index a29fcdf9..723591b0 100644
--- a/packages/overlay/README.md
+++ b/packages/overlay/README.md
@@ -87,13 +87,14 @@ Page({
 
 ### Props
 
-| 参数         | 说明             | 类型               | 默认值  | 版本 |
-| ------------ | ---------------- | ------------------ | ------- | ---- |
-| show         | 是否展示遮罩层   | _boolean_          | `false` | -    |
-| z-index      | z-index 层级     | _string \| number_ | `1`     | -    |
-| duration     | 动画时长，单位秒 | _string \| number_ | `0.3`   | -    |
-| class-name   | 自定义类名       | _string_           | -       | -    |
-| custom-style | 自定义样式       | _string_           | -       | -    |
+| 参数                | 说明                                             | 类型               | 默认值  |
+| ------------        | ------------------------------------------------ | ------------------ | ------- |
+| show                | 是否展示遮罩层                                   | _boolean_          | `false` |
+| z-index             | z-index 层级                                     | _string \| number_ | `1`     |
+| duration            | 动画时长，单位秒                                 | _string \| number_ | `0.3`   |
+| class-name          | 自定义类名                                       | _string_           | -       |
+| custom-style        | 自定义样式                                       | _string_           | -       |
+| lock-scroll `1.7.3` | 是否锁定背景滚动，锁定时蒙层里的内容也将无法滚动 | _boolean_          | true    |
 
 ### Events
 
diff --git a/packages/overlay/index.ts b/packages/overlay/index.ts
index 80f5103f..0fdfa777 100644
--- a/packages/overlay/index.ts
+++ b/packages/overlay/index.ts
@@ -12,6 +12,10 @@ VantComponent({
       type: Number,
       value: 1,
     },
+    lockScroll: {
+      type: Boolean,
+      value: true,
+    },
   },
 
   methods: {
diff --git a/packages/overlay/index.wxml b/packages/overlay/index.wxml
index 9212348b..92734a0c 100644
--- a/packages/overlay/index.wxml
+++ b/packages/overlay/index.wxml
@@ -1,4 +1,5 @@
 <van-transition
+  wx:if="{{ lockScroll }}"
   show="{{ show }}"
   custom-class="van-overlay"
   custom-style="z-index: {{ zIndex }}; {{ customStyle }}"
@@ -8,3 +9,13 @@
 >
   <slot></slot>
 </van-transition>
+<van-transition
+  wx:else
+  show="{{ show }}"
+  custom-class="van-overlay"
+  custom-style="z-index: {{ zIndex }}; {{ customStyle }}"
+  duration="{{ duration }}"
+  bind:tap="onClick"
+>
+  <slot></slot>
+</van-transition>