diff --git a/wm/src/window_session_impl.cpp b/wm/src/window_session_impl.cpp
index b86a6efab99b98ab9709f962ce1552a29ff107ed..1e7c8ce9407647942a47e20f434b68f0c63150fb 100644
--- a/wm/src/window_session_impl.cpp
+++ b/wm/src/window_session_impl.cpp
@@ -2338,7 +2338,8 @@ void WindowSessionImpl::UpdateDecorEnableToAce(bool isDecorEnable)
         if (windowSystemConfig_.freeMultiWindowSupport_) {
             auto isSubWindow = WindowHelper::IsSubWindow(GetType());
             decorVisible = decorVisible && (windowSystemConfig_.freeMultiWindowEnable_ ||
-                (property_->GetIsPcAppInPad() && isSubWindow));
+                (property_->GetIsPcAppInPad() && isSubWindow)) &&
+                !(mode == WindowMode::WINDOW_MODE_FULLSCREEN && property_->GetCompatibleModeProperty());
         }
         uiContent->UpdateDecorVisible(decorVisible, isDecorEnable);
         return;
@@ -2366,7 +2367,8 @@ void WindowSessionImpl::UpdateDecorEnable(bool needNotify, WindowMode mode)
             if (windowSystemConfig_.freeMultiWindowSupport_) {
                 auto isSubWindow = WindowHelper::IsSubWindow(GetType());
                 decorVisible = decorVisible && (windowSystemConfig_.freeMultiWindowEnable_ ||
-                    (property_->GetIsPcAppInPad() && isSubWindow));
+                    (property_->GetIsPcAppInPad() && isSubWindow)) &&
+                    !(mode == WindowMode::WINDOW_MODE_FULLSCREEN && property_->GetCompatibleModeProperty());
             }
             if (GetWindowMode() == WindowMode::WINDOW_MODE_FULLSCREEN && property_->IsDecorFullscreenDisabled()) {
                 decorVisible = false;