diff --git a/api/@ohos.application.WindowExtensionAbility.d.ts b/api/@ohos.application.WindowExtensionAbility.d.ts
index ee8a1b08b9e62f0ee78024a3c5e7f096aeffa47f..b5810d91a6c07bcc129b41cf24aae909627a4b38 100644
--- a/api/@ohos.application.WindowExtensionAbility.d.ts
+++ b/api/@ohos.application.WindowExtensionAbility.d.ts
@@ -30,8 +30,9 @@ import window from './@ohos.window';
  * @systemapi hide for inner use.
  * @StageModelOnly
  * @since 9
+ * @deprecated since 21
  */
-export default class WindowExtensionAbility {
+declare class WindowExtensionAbility {
   /**
    * Indicates window extension ability context.
    *
@@ -40,6 +41,7 @@ export default class WindowExtensionAbility {
    * @systemapi hide for inner use.
    * @StageModelOnly
    * @since 9
+   * @deprecated since 21
    */
   context: WindowExtensionContext;
 
@@ -51,6 +53,7 @@ export default class WindowExtensionAbility {
    * @systemapi hide for inner use.
    * @StageModelOnly
    * @since 9
+   * @deprecated since 21
    */
   onConnect(want: Want): void;
 
@@ -62,6 +65,7 @@ export default class WindowExtensionAbility {
    * @systemapi hide for inner use.
    * @StageModelOnly
    * @since 9
+   * @deprecated since 21
    */
   onDisconnect(want: Want): void;
 
@@ -73,10 +77,13 @@ export default class WindowExtensionAbility {
    * @systemapi hide for inner use.
    * @StageModelOnly
    * @since 9
+   * @deprecated since 21
    */
   onWindowReady(window: window.Window): void;
 }
 
+export default WindowExtensionAbility;
+
 /**
  * The context of window extension. It allows access to
  * windowExtension-specific resources.
@@ -86,5 +93,6 @@ export default class WindowExtensionAbility {
  * @systemapi
  * @stagemodelonly
  * @since 9
+ * @deprecated since 21
  */
 export type WindowExtensionContext = _WindowExtensionContext;
diff --git a/api/application/WindowExtensionContext.d.ts b/api/application/WindowExtensionContext.d.ts
index 107da461c617badf90a110ed713a19c0300afbde..088bf66e26e1846135dea19ae7a4bad1befe68d6 100644
--- a/api/application/WindowExtensionContext.d.ts
+++ b/api/application/WindowExtensionContext.d.ts
@@ -32,8 +32,9 @@ import StartOptions from '../@ohos.app.ability.StartOptions';
  * @systemapi
  * @stagemodelonly
  * @since 9
+ * @deprecated since 21
  */
-export default class WindowExtensionContext extends ExtensionContext {
+declare class WindowExtensionContext extends ExtensionContext {
   /**
    * Window extension uses this method to start a specific ability.
    *
@@ -60,6 +61,7 @@ export default class WindowExtensionContext extends ExtensionContext {
    * @systemapi
    * @stagemodelonly
    * @since 12
+   * @deprecated since 21
    */
   startAbility(want: Want, options: StartOptions, callback: AsyncCallback<void>): void;
 
@@ -89,6 +91,8 @@ export default class WindowExtensionContext extends ExtensionContext {
    * @systemapi
    * @stagemodelonly
    * @since 12
+   * @deprecated since 21
    */
   startAbility(want: Want, options?: StartOptions): Promise<void>;
 }
+export default WindowExtensionContext;
\ No newline at end of file