diff --git a/flutter_inappwebview_ohos/ohos/src/main/ets/components/plugin/find_interaction/FindInteractionController.ets b/flutter_inappwebview_ohos/ohos/src/main/ets/components/plugin/find_interaction/FindInteractionController.ets
index b040118f047c03e64ce4d48cdc54069ec49cd9e0..936b048feeb21a02cd8259b69a67671c7e2c9186 100644
--- a/flutter_inappwebview_ohos/ohos/src/main/ets/components/plugin/find_interaction/FindInteractionController.ets
+++ b/flutter_inappwebview_ohos/ohos/src/main/ets/components/plugin/find_interaction/FindInteractionController.ets
@@ -68,6 +68,9 @@ export class FindInteractionController implements Disposable {
   }
 
   dispose(): void {
-    throw new Error('Method not implemented.');
+    if(this.channelDelegate != null){
+      this.channelDelegate.dispose();
+      this.channelDelegate = null;
+    }
   }
 }
\ No newline at end of file
diff --git a/flutter_inappwebview_ohos/ohos/src/main/ets/components/plugin/webview/in_app_webview/InAppWebView.ets b/flutter_inappwebview_ohos/ohos/src/main/ets/components/plugin/webview/in_app_webview/InAppWebView.ets
index c533bee1c5e43cfed5b9bb7d1605d181d1ac6808..0bb2006634a7b4474684e2bb4a5a447de9a261b0 100644
--- a/flutter_inappwebview_ohos/ohos/src/main/ets/components/plugin/webview/in_app_webview/InAppWebView.ets
+++ b/flutter_inappwebview_ohos/ohos/src/main/ets/components/plugin/webview/in_app_webview/InAppWebView.ets
@@ -74,7 +74,7 @@ export default class InAppWebView implements InAppWebViewInterface {
   public id: number;
   public windowId: number | null | undefined;
   public inAppWebViewClient: InAppWebViewClient | null = null;
-  public channelDelegate: WebViewChannelDelegate;
+  public channelDelegate: WebViewChannelDelegate | null = null;
   private javaScriptBridgeInterface: JavaScriptBridgeInterface | null = null;
   public customSettings: InAppWebViewSettings;
   public isLoading: boolean = false
@@ -695,6 +695,26 @@ export default class InAppWebView implements InAppWebViewInterface {
       this.webViewAssetLoaderExt.dispose();
       this.webViewAssetLoaderExt = null;
     }
+    if(this.controller){
+      this.controller.deleteJavaScriptRegister(JavaScriptBridgeJS.JAVASCRIPT_BRIDGE_NAME);
+      this.controller.refresh();
+    }
+    if(this.javaScriptBridgeInterface != null){
+      this.javaScriptBridgeInterface.dispose();
+      this.javaScriptBridgeInterface = null;
+    }
+    if(this.findInteractionController != null){
+      this.findInteractionController.dispose();
+      this.findInteractionController = null;
+    }
+    if(this.pullToRefreshLayout != null){
+      this.pullToRefreshLayout.dispose();
+      this.pullToRefreshLayout = null;
+    }
+    if(this.channelDelegate != null){
+      this.channelDelegate.dispose();
+      this.channelDelegate = null;
+    }
   }
 
   getUrl(): string {
diff --git a/flutter_inappwebview_ohos/ohos/src/main/ets/components/plugin/webview/in_app_webview/InAppWebViewClient.ets b/flutter_inappwebview_ohos/ohos/src/main/ets/components/plugin/webview/in_app_webview/InAppWebViewClient.ets
index 72ed83e5544ccf4f4836f054ddb0d5f3ca370048..23e24258e19ceebed666810adbba760489f28da1 100644
--- a/flutter_inappwebview_ohos/ohos/src/main/ets/components/plugin/webview/in_app_webview/InAppWebViewClient.ets
+++ b/flutter_inappwebview_ohos/ohos/src/main/ets/components/plugin/webview/in_app_webview/InAppWebViewClient.ets
@@ -151,7 +151,7 @@ export default class InAppWebViewClient {
         URLUtil.guessFileName(event.url, event.contentDisposition, event.mimetype),
         null
       );
-      this.inAppWebView.channelDelegate.onDownloadStartRequest(downloadStartRequest)
+      this.inAppWebView.channelDelegate?.onDownloadStartRequest(downloadStartRequest)
     }
   }
   onErrorReceive = (event: Any) => {