diff --git a/api/@ohos.arkui.UIContext.d.ts b/api/@ohos.arkui.UIContext.d.ts
index 9278165b5bd7f616acb3e86bc9c9dc9e263c4191..c9c59fa7996a272587ac741f61529f1cccffaa59 100644
--- a/api/@ohos.arkui.UIContext.d.ts
+++ b/api/@ohos.arkui.UIContext.d.ts
@@ -4840,6 +4840,17 @@ export declare class UIContext {
    * @since 21
    */
   static setResourceManagerCacheMaxCountForHSP(count: number): void;
+
+  /**
+   * Get id of the UI instance.
+   *
+   * @returns { number } Returns id of the UI instance.
+   * @syscap SystemCapability.ArkUI.ArkUI.Full
+   * @crossplatform
+   * @atomicservice
+   * @since 22
+   */
+  getId(): number;
 }
 
 /**