diff --git a/zh-cn/release-notes/changelogs/OpenHarmony_4.0.9.3/changelogs-arkui.md b/zh-cn/release-notes/changelogs/OpenHarmony_4.0.9.3/changelogs-arkui.md
index a4b593c685b308990862618ac72f9599f4e2c12c..52b7034587cf576bcc54229a275cb25fe803f39b 100644
--- a/zh-cn/release-notes/changelogs/OpenHarmony_4.0.9.3/changelogs-arkui.md
+++ b/zh-cn/release-notes/changelogs/OpenHarmony_4.0.9.3/changelogs-arkui.md
@@ -161,3 +161,69 @@ struct Child {
   }
 }
 ```
+## cl.arkui.3 canvas组件onReady事件行为变更
+
+**说明**
+onReady事件在组件创建完成后或组件大小发生变化时触发，并清空画布。
+
+**示例：**
+```ts
+@Entry
+@Component
+struct OnReadyDiff {
+  @State message: string = 'init '
+  @State isShow: boolean = false
+  @State myHeight: number = 300
+  private settings: RenderingContextSettings = new RenderingContextSettings(true);
+  private context: CanvasRenderingContext2D = new CanvasRenderingContext2D(this.settings);
+
+  build() {
+    Row() {
+      Column() {
+        Text(this.message)
+          .fontSize(50)
+          .fontWeight(FontWeight.Bold)
+        Button('ChangePosition')
+          .onClick(()=>{
+            this.isShow = !this.isShow
+          })
+        if (this.isShow) {
+          Button('new button')
+            .height(200)
+        }
+        Button('ChangeHeight')
+          .onClick(()=>{
+            this.myHeight = this.myHeight==300?500:300
+          })
+
+        Canvas(this.context)
+          .width(300)
+          .height(this.myHeight)
+          .backgroundColor('#ffff00')
+          .onReady(() =>{
+            this.context.fillRect(0, 0, 100, 100)
+            this.message += 'a '
+          })
+        Button('draw another')
+          .onClick(()=>{
+            this.context.fillRect(100, 100, 100, 100)
+          })
+      }
+      .width('100%')
+    }
+    .height('100%')
+  }
+}
+```
+
+API version 9：onReady在组件创建完成时触发，位置变化时会触发，组件大小变化时也会触发。
+
+![stack](figures/api9onReady.gif)
+
+API version 10及以后：onReady在组件创建完成时触发，在组件位置变化时不会触发，组件大小变化时会触发。
+
+![stack](figures/api10onReady.gif)
+
+**变更影响**
+
+onReady事件在组件位置发生变化时行为变更，API version 9及以前会触发，API version 10及以后不会触发。
\ No newline at end of file
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