diff --git a/zh-cn/application-dev/key-features/multi-device-app-dev/case.md b/zh-cn/application-dev/key-features/multi-device-app-dev/case.md
index f1dc34b9e0514708dca74b4e1f67889d730d57f7..0792abdeb6ecd0c060cdba2794501436a6563105 100644
--- a/zh-cn/application-dev/key-features/multi-device-app-dev/case.md
+++ b/zh-cn/application-dev/key-features/multi-device-app-dev/case.md
@@ -467,8 +467,8 @@ const globalMessageList:any[] = [
 
   | 断点 | 窗口宽度(vp) | 栅格总列数 | 消息气泡占用的列数 | 接收场景偏移的列数 | 发送场景偏移的列数 | 
 | -------- | -------- | -------- | -------- | -------- | -------- |
-| sm | [320, 520) | 12 | 12 | 0 | 0 | 
-| md | [520, 840) | 12 | 8 | 0 | 4 | 
+| sm | [320, 600) | 12 | 12 | 0 | 0 | 
+| md | [600, 840) | 12 | 8 | 0 | 4 | 
 | lg | [840, +∞) | 12 | 8 | 0 | 4 | 
 
   | 默认设备 | 平板 | 
diff --git a/zh-cn/application-dev/key-features/multi-device-app-dev/design-delivery.md b/zh-cn/application-dev/key-features/multi-device-app-dev/design-delivery.md
index 658db5e5e1a18a8a49be9f990a4badbddeb6f6d2..49f29e94a09f65410f508301464bebca900c51dc 100644
--- a/zh-cn/application-dev/key-features/multi-device-app-dev/design-delivery.md
+++ b/zh-cn/application-dev/key-features/multi-device-app-dev/design-delivery.md
@@ -35,8 +35,8 @@
   | 设备类型 | 屏幕宽度 | 画板尺寸（vp） | 
 | -------- | -------- | -------- |
 | 超小设备 | [0, 320) | 240\*320 | 
-| 小设备 | [320, 520) | 360\*780 | 
-| 中设备 | [520, 840) | 677\*763 | 
+| 小设备 | [320, 600) | 360\*780 | 
+| 中设备 | [600, 840) | 677\*763 | 
 | 大设备 | [840, +) | 1280\*800 | 
 
 多设备效果示意图
diff --git a/zh-cn/application-dev/key-features/multi-device-app-dev/responsive-layout.md b/zh-cn/application-dev/key-features/multi-device-app-dev/responsive-layout.md
index 270181beca5a233e31e91b90958b0a79174426f7..5bd5144d57b201b20310a141a8fed69ee55d6528 100644
--- a/zh-cn/application-dev/key-features/multi-device-app-dev/responsive-layout.md
+++ b/zh-cn/application-dev/key-features/multi-device-app-dev/responsive-layout.md
@@ -24,8 +24,8 @@
   | 断点名称 | 取值范围（vp） | 
 | -------- | -------- |
 | xs | [0, 320） | 
-| sm | [320, 520) | 
-| md | [520, 840) | 
+| sm | [320, 600) | 
+| md | [600, 840) | 
 | lg | [840, +∞) | 
 
 > **说明：**
@@ -66,7 +66,7 @@ OpenHarmony提供了多种方法，判断应用当前处于何种断点，进而
        let newBp: string = ''
        if (windowWidthVp < 320) {
          newBp = 'xs'
-       } else if (windowWidthVp < 520) {
+       } else if (windowWidthVp < 600) {
          newBp = 'sm'
        } else if (windowWidthVp < 840) {
          newBp = 'md'
@@ -209,9 +209,9 @@ export class BreakpointSystem {
   }
 
   public register() {
-    this.smListener = mediaquery.matchMediaSync("(320vp<width<520vp)")
+    this.smListener = mediaquery.matchMediaSync("(320vp<width<600vp)")
     this.smListener.on("change", this.isBreakpointSM)
-    this.mdListener = mediaquery.matchMediaSync("(520vp<width<840vp)")
+    this.mdListener = mediaquery.matchMediaSync("(600vp<width<840vp)")
     this.mdListener.on("change", this.isBreakpointMD)
     this.lgListener = mediaquery.matchMediaSync("(840vp<width)")
     this.lgListener.on("change", this.isBreakpointLG)
diff --git a/zh-cn/application-dev/key-features/multi-device-app-dev/start-with-a-example.md b/zh-cn/application-dev/key-features/multi-device-app-dev/start-with-a-example.md
index 16e0865ada7cfc381a84c293f0774f10c682379f..ebc5f5f701fa3e994f0bc973d9fd9f73f444622b 100644
--- a/zh-cn/application-dev/key-features/multi-device-app-dev/start-with-a-example.md
+++ b/zh-cn/application-dev/key-features/multi-device-app-dev/start-with-a-example.md
@@ -15,8 +15,8 @@
   | 设备类型 | 屏幕宽度（vp） | 
 | -------- | -------- |
 | 超小设备 | [0,&nbsp;320) | 
-| 小设备 | [320,&nbsp;520) | 
-| 中设备 | [520,&nbsp;840) | 
+| 小设备 | [320,&nbsp;600) | 
+| 中设备 | [600,&nbsp;840) | 
 | 大设备 | [840,&nbsp;+∞) | 
 
 > **说明：**