diff --git a/content/browser/web_contents/web_contents_impl.cc b/content/browser/web_contents/web_contents_impl.cc
index 34aec058693edaf409adb47ae3a3a2b8024f6ca2..1dca3ecc6f512045bef482f72c8028f1aef5c84c 100644
--- a/content/browser/web_contents/web_contents_impl.cc
+++ b/content/browser/web_contents/web_contents_impl.cc
@@ -8728,6 +8728,9 @@ void WebContentsImpl::BeforeUnloadFiredFromRenderManager(
   observers_.NotifyObservers(&WebContentsObserver::BeforeUnloadFired, proceed);
   if (delegate_)
     delegate_->BeforeUnloadFired(this, proceed, proceed_to_fire_unload);
+#if defined(OHOS_DISPATCH_BEFORE_UNLOAD)
+  OnBeforeUnloadFired(*proceed_to_fire_unload);
+#endif // OHOS_DISPATCH_BEFORE_UNLOAD
   // Note: |this| might be deleted at this point.
 }
 
@@ -10651,4 +10654,12 @@ const std::string& WebContentsImpl::SharedRenderProcessToken() {
 }
 #endif
 
+#if defined(OHOS_DISPATCH_BEFORE_UNLOAD)
+void WebContentsImpl::OnBeforeUnloadFired(bool proceed) {
+  if (delegate_) {
+    delegate_->OnBeforeUnloadFired(proceed);
+  }
+}
+#endif // OHOS_DISPATCH_BEFORE_UNLOAD
+
 }  // namespace content
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index 21a08ccf60a3fd8c8477394a9bb8e8e48a05c97e..c8fb45a474b119cc828dceaefdfab44f7ebd6282 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -1572,6 +1572,10 @@ class CONTENT_EXPORT WebContentsImpl : public WebContents,
   const std::string& SharedRenderProcessToken() override;
 #endif
 
+#if defined(OHOS_DISPATCH_BEFORE_UNLOAD)
+  void OnBeforeUnloadFired(bool proceed) override;
+#endif // OHOS_DISPATCH_BEFORE_UNLOAD
+
  private:
   using FrameTreeIterationCallback = base::RepeatingCallback<void(FrameTree&)>;
   using RenderViewHostIterationCallback =
diff --git a/content/public/browser/web_contents.h b/content/public/browser/web_contents.h
index f19018edf32cf7ffe1e4b8aa5cda75acbeb22633..c5e0de3ed491f45c1e3a4d9b3da426d8211060a3 100644
--- a/content/public/browser/web_contents.h
+++ b/content/public/browser/web_contents.h
@@ -1553,6 +1553,9 @@ class WebContents : public PageNavigator,
 #ifdef OHOS_DRAG_DROP
   virtual void ClearContextMenu() = 0;
 #endif //OHOS_DRAG_DROP
+#if defined(OHOS_DISPATCH_BEFORE_UNLOAD)
+  virtual void OnBeforeUnloadFired(bool proceed) = 0;
+#endif // OHOS_DISPATCH_BEFORE_UNLOAD
  private:
   // This interface should only be implemented inside content.
   friend class WebContentsImpl;
diff --git a/content/public/browser/web_contents_delegate.h b/content/public/browser/web_contents_delegate.h
index 7748270befbd1289081593cb38b9926ce24453ea..72abcda03c605603a3e8a0e8b5e0e48e0d38356b 100644
--- a/content/public/browser/web_contents_delegate.h
+++ b/content/public/browser/web_contents_delegate.h
@@ -844,6 +844,9 @@ class CONTENT_EXPORT WebContentsDelegate {
   virtual void OnShowVideoAssistant(const std::string& videoAssistantItems);
   virtual void OnReportStatisticLog(const std::string& content);
 #endif  // defined(OHOS_VIDEO_ASSISTANT)
+#if defined(OHOS_DISPATCH_BEFORE_UNLOAD)
+  virtual void OnBeforeUnloadFired(bool proceed) {}
+#endif // OHOS_DISPATCH_BEFORE_UNLOAD
 
  protected:
   virtual ~WebContentsDelegate();
diff --git a/ohos_build/build/config/ohos.json b/ohos_build/build/config/ohos.json
index 7ec779d0adfebb63b6f967a79ec9165c504851eb..62491f275d64a10f55c6a9c7081be88d0428c015 100644
--- a/ohos_build/build/config/ohos.json
+++ b/ohos_build/build/config/ohos.json
@@ -250,6 +250,15 @@
     "dependence": "",
     "default": "true"
 },
+{
+    "name": "OHOS_DISPATCH_BEFORE_UNLOAD",
+    "owner": "",
+    "desc": "",
+    "effect":"main gn blink_core other",
+    "genCommandline": "default",
+    "dependence": "",
+    "default": "true"
+},
 {
     "name": "OHOS_DISPLAY_CUTOUT",
     "owner": "",
diff --git a/ohos_nweb/src/capi/nweb_app_client_extension_callback.h b/ohos_nweb/src/capi/nweb_app_client_extension_callback.h
index 6e6dba64f2fab5fa146a2e9f9c2ae9835f84cba4..f00616723b8e2a5f0ec7ad093fe443ea2ab4460f 100644
--- a/ohos_nweb/src/capi/nweb_app_client_extension_callback.h
+++ b/ohos_nweb/src/capi/nweb_app_client_extension_callback.h
@@ -70,6 +70,9 @@ struct NWebAppClientExtensionCallback {
 
   void (*OnShowVideoAssistant)(int32_t nweb_id,
                                const char* video_assistant_items);
+#if defined(OHOS_DISPATCH_BEFORE_UNLOAD)
+  void (*OnBeforeUnloadFired)(bool proceed, int nweb_id);
+#endif // OHOS_DISPATCH_BEFORE_UNLOAD
 };
 
 #endif  // OHOS_NWEB_SRC_NWEB_APP_CLIENT_EXTENSION_CALLBACK_H_
diff --git a/ohos_nweb/src/cef_delegate/nweb_delegate.cc b/ohos_nweb/src/cef_delegate/nweb_delegate.cc
index ef26c164df069c93517c27b5e0b9dcb3cbccd6fa..e2b7adc676bc8046ed3c4970d4c119125b1bb9c8 100644
--- a/ohos_nweb/src/cef_delegate/nweb_delegate.cc
+++ b/ohos_nweb/src/cef_delegate/nweb_delegate.cc
@@ -4374,5 +4374,20 @@ void NWebDelegate::CloseDevtools() {
   }
   GetBrowser()->GetHost()->CloseDevTools();
 }
+#if defined(OHOS_DISPATCH_BEFORE_UNLOAD)
+bool NWebDelegate::NeedToFireBeforeUnloadOrUnloadEvents() {
+  if (GetBrowser().get()) {
+    return GetBrowser()->NeedToFireBeforeUnloadOrUnloadEvents();
+  }
+  return false;
+}
+
+void NWebDelegate::DispatchBeforeUnload() {
+  LOG(INFO) << "NWebDelegate::DispatchBeforeUnload";
+  if (GetBrowser().get()) {
+    GetBrowser()->DispatchBeforeUnload();
+  }
+}
+#endif // OHOS_DISPATCH_BEFORE_UNLOAD
 
 }  // namespace OHOS::NWeb
diff --git a/ohos_nweb/src/cef_delegate/nweb_delegate.h b/ohos_nweb/src/cef_delegate/nweb_delegate.h
index 55b161c4de6df56591c910077f4e63c667fa1cf2..a8a4fcd39b399210e682ed09505a5bb75dca71b6 100644
--- a/ohos_nweb/src/cef_delegate/nweb_delegate.h
+++ b/ohos_nweb/src/cef_delegate/nweb_delegate.h
@@ -561,6 +561,11 @@ void NotifyForNextTouchEvent() override;
       std::unique_ptr<OpenDevToolsParam> param) override;
   void CloseDevtools() override;
 
+#if defined(OHOS_DISPATCH_BEFORE_UNLOAD)
+  bool NeedToFireBeforeUnloadOrUnloadEvents() override;
+  void DispatchBeforeUnload() override;
+#endif // OHOS_DISPATCH_BEFORE_UNLOAD
+
  public:
   int argc_;
   const char** argv_;
diff --git a/ohos_nweb/src/cef_delegate/nweb_handler_delegate.cc b/ohos_nweb/src/cef_delegate/nweb_handler_delegate.cc
index 90a145b3820469fbfb6e2692bbaf92b360c8e68f..bd499043b01d560b2d18dd73f180be0693296eec 100644
--- a/ohos_nweb/src/cef_delegate/nweb_handler_delegate.cc
+++ b/ohos_nweb/src/cef_delegate/nweb_handler_delegate.cc
@@ -3911,5 +3911,15 @@ void NWebHandlerDelegate::OnRequestOpenDevTools() {
   web_app_client_extension_listener_->OnRequestOpenDevTools(
       web_app_client_extension_listener_->nweb_id);
 }
+#if defined(OHOS_DISPATCH_BEFORE_UNLOAD)
+void NWebHandlerDelegate::OnBeforeUnloadFired(CefRefPtr<CefBrowser> browser,
+                                              bool proceed) {
+  if (web_app_client_extension_listener_ != nullptr &&
+      web_app_client_extension_listener_->OnBeforeUnloadFired != nullptr) {
+    web_app_client_extension_listener_->OnBeforeUnloadFired(
+        proceed, web_app_client_extension_listener_->nweb_id);
+  }
+}
+#endif // OHOS_DISPATCH_BEFORE_UNLOAD
 
 }  // namespace OHOS::NWeb
diff --git a/ohos_nweb/src/cef_delegate/nweb_handler_delegate.h b/ohos_nweb/src/cef_delegate/nweb_handler_delegate.h
index b31b9b0945b85372d5c15b808f7696599430144a..5206f4704b91bb3bb7d216a3b69fcae35422d647 100644
--- a/ohos_nweb/src/cef_delegate/nweb_handler_delegate.h
+++ b/ohos_nweb/src/cef_delegate/nweb_handler_delegate.h
@@ -781,6 +781,10 @@ class NWebHandlerDelegate : public CefClient,
 
   void OnRequestOpenDevTools();
 
+#if defined(OHOS_DISPATCH_BEFORE_UNLOAD)
+ void OnBeforeUnloadFired(CefRefPtr<CefBrowser> browser,
+                          bool proceed) override;
+#endif // OHOS_DISPATCH_BEFORE_UNLOAD
  private:
   void CopyImageToClipboard(CefRefPtr<CefImage> image);
   // List of existing browser windows. Only accessed on the CEF UI thread.
diff --git a/ohos_nweb/src/nweb_delegate_interface.h b/ohos_nweb/src/nweb_delegate_interface.h
index e32322137399415000637b51913614581b39c105..fe480634595951a7a70168814d6f02c179be0f61 100644
--- a/ohos_nweb/src/nweb_delegate_interface.h
+++ b/ohos_nweb/src/nweb_delegate_interface.h
@@ -573,6 +573,10 @@ class NWebDelegateInterface
       std::shared_ptr<NWebDelegateInterface> nweb_delegate,
       std::unique_ptr<OpenDevToolsParam> param) = 0;
   virtual void CloseDevtools() = 0;
+#if defined(OHOS_DISPATCH_BEFORE_UNLOAD)
+  virtual bool NeedToFireBeforeUnloadOrUnloadEvents() = 0;
+  virtual void DispatchBeforeUnload() = 0;
+#endif // OHOS_DISPATCH_BEFORE_UNLOAD
 };
 }  // namespace OHOS::NWeb
 
diff --git a/ohos_nweb/src/nweb_impl.cc b/ohos_nweb/src/nweb_impl.cc
index c26d0cbfd0c645442e960f6709252926ab13636a..4d85a3ecaeee43ad34411b5fdd3f1ba0d7b253c0 100644
--- a/ohos_nweb/src/nweb_impl.cc
+++ b/ohos_nweb/src/nweb_impl.cc
@@ -3772,3 +3772,19 @@ int NWebImpl::ScaleGestureChangeV2(int type,
   }
   return nweb_delegate_->ScaleGestureChangeV2(type, scale, originScale, centerX, centerY);
 }
+#if defined(OHOS_DISPATCH_BEFORE_UNLOAD)
+bool NWebImpl::NeedToFireBeforeUnloadOrUnloadEvents() {
+  if (nweb_delegate_ == nullptr) {
+    return false;
+  }
+  return nweb_delegate_->NeedToFireBeforeUnloadOrUnloadEvents();
+}
+
+void NWebImpl::DispatchBeforeUnload() {
+  if (nweb_delegate_ == nullptr) {
+    return;
+  }
+  nweb_delegate_->DispatchBeforeUnload();
+}
+
+#endif // OHOS_DISPATCH_BEFORE_UNLOAD
diff --git a/ohos_nweb/src/nweb_impl.h b/ohos_nweb/src/nweb_impl.h
index 31e09544dd3657c59595c441375dfef1fdaf0c0a..d06b40d0109cda9c382b60a1e0cf009f33977971 100644
--- a/ohos_nweb/src/nweb_impl.h
+++ b/ohos_nweb/src/nweb_impl.h
@@ -599,6 +599,10 @@ class NWebImpl : public NWeb {
   void OnConfigurationUpdated(
       std::shared_ptr<NWebSystemConfiguration> configuration) override;
 #endif
+#if defined(OHOS_DISPATCH_BEFORE_UNLOAD)
+ bool NeedToFireBeforeUnloadOrUnloadEvents();
+ void DispatchBeforeUnload();
+#endif // OHOS_DISPATCH_BEFORE_UNLOAD
 
  private:
   void ProcessInitArgs(std::shared_ptr<NWebEngineInitArgs> init_args);