diff --git a/wmserver/include/window_root.h b/wmserver/include/window_root.h
index 53912074..b914260b 100644
--- a/wmserver/include/window_root.h
+++ b/wmserver/include/window_root.h
@@ -41,6 +41,7 @@ public:
     sptr<WindowNodeContainer> GetWindowNodeContainer(DisplayId displayId);
     sptr<WindowNodeContainer> CreateWindowNodeContainer(sptr<DisplayInfo> displayInfo);
     sptr<WindowNode> GetWindowNode(uint32_t windowId) const;
+    void GetBackgroundNodesByScreenId(ScreenId screenGroupId, std::vector<sptr<WindowNode>>& windowNodes) const;
 
     WMError SaveWindow(const sptr<WindowNode>& node);
     void AddDeathRecipient(sptr<WindowNode> node);
@@ -84,7 +85,7 @@ public:
     void SetBrightness(uint32_t windowId, float brightness);
     void HandleKeepScreenOn(uint32_t windowId, bool requireLock);
     void UpdateFocusableProperty(uint32_t windowId);
-    void SetMaxAppWindowNumber(int windowNum);
+    void SetMaxAppWindowNumber(uint32_t windowNum);
     WMError GetModeChangeHotZones(DisplayId displayId,
         ModeChangeHotZones& hotZones, const ModeChangeHotZonesConfig& config);
     std::vector<DisplayId> GetAllDisplayIds() const;
@@ -100,6 +101,7 @@ public:
     sptr<WindowNode> FindDialogCallerNode(WindowType type, sptr<IRemoteObject> token);
     bool CheckMultiDialogWindows(WindowType type, sptr<IRemoteObject> token);
     bool HasPrivateWindow(DisplayId displayId);
+
 private:
     void OnRemoteDied(const sptr<IRemoteObject>& remoteObject);
     WMError DestroyWindowInner(sptr<WindowNode>& node);
diff --git a/wmserver/src/window_dumper.cpp b/wmserver/src/window_dumper.cpp
index f1fe6015..6115d4fd 100644
--- a/wmserver/src/window_dumper.cpp
+++ b/wmserver/src/window_dumper.cpp
@@ -88,8 +88,15 @@ WMError WindowDumper::DumpScreenGroupWindowInfo(ScreenId screenGroupId,
         << std::endl;
     std::vector<sptr<WindowNode>> windowNodes;
     windowNodeContainer->TraverseContainer(windowNodes);
-    uint32_t zOrder = windowNodes.size();
+    int zOrder = windowNodes.size();
+    windowRoot_->GetBackgroundNodesByScreenId(screenGroupId, windowNodes);
     for (auto& windowNode : windowNodes) {
+        if (zOrder < 0) {
+            zOrder = 0;
+        } else if (zOrder == 0) {
+            oss << "---------------------------------------------------------------------------------------"
+                << std::endl;
+        }
         if (windowNode == nullptr) {
             --zOrder;
             break;
diff --git a/wmserver/src/window_root.cpp b/wmserver/src/window_root.cpp
index 6b7016c4..85a03bab 100644
--- a/wmserver/src/window_root.cpp
+++ b/wmserver/src/window_root.cpp
@@ -144,6 +144,16 @@ sptr<WindowNode> WindowRoot::GetWindowNode(uint32_t windowId) const
     return iter->second;
 }
 
+void WindowRoot::GetBackgroundNodesByScreenId(ScreenId screenGroupId, std::vector<sptr<WindowNode>>& windowNodes) const
+{
+    for (const auto& it : windowNodeMap_) {
+        if (it.second && screenGroupId == DisplayManagerServiceInner::GetInstance().GetScreenGroupIdByDisplayId(
+            it.second->GetDisplayId()) && !it.second->currentVisibility_) {
+            windowNodes.push_back(it.second);
+        }
+    }
+}
+
 sptr<WindowNode> WindowRoot::FindWindowNodeWithToken(const sptr<IRemoteObject>& token) const
 {
     if (token == nullptr) {
@@ -1308,7 +1318,7 @@ bool WindowRoot::HasPrivateWindow(DisplayId displayId)
     return container != nullptr ? container->HasPrivateWindow() : false;
 }
 
-void WindowRoot::SetMaxAppWindowNumber(int windowNum)
+void WindowRoot::SetMaxAppWindowNumber(uint32_t windowNum)
 {
     maxAppWindowNumber_ = windowNum;
 }