diff --git a/api/@ohos.web.webview.d.ts b/api/@ohos.web.webview.d.ts
index f3865eae0f5333f47aec35470401abbcb0ca2b72..cd6bdcf3807f2206b005b7803addff49deeb26ca 100644
--- a/api/@ohos.web.webview.d.ts
+++ b/api/@ohos.web.webview.d.ts
@@ -1113,6 +1113,28 @@ declare namespace webview {
          * @since 9
          */
         slideScroll(vx:number, vy:number): void;
+
+        /**
+         * Serialize the access stack of the web, that is, the history of access.
+         *
+         * @throws { BusinessError } 17100001 - Init error.
+         *                           The WebviewController must be associated with a Web component.
+         * @returns { Uint8Array } Web access stack after serialization.
+         *
+         * @since 9
+         */
+        serializeWebState() : Uint8Array;
+
+        /**
+         * Restoring the web access stack, that is, the history of access.
+         * 
+         * @param { Uint8Array } state - Web access stack after serialization.
+         * @throws { BusinessError } 401 - Invalid input parameter.
+         * @throws { BusinessError } 17100001 - Init error.
+         *                           The WebviewController must be associated with a Web component.
+         * @since 9
+         */
+        restoreWebState(state: Uint8Array) : void;
     }
 }