diff --git a/window_scene/screen_session_manager/src/connection/screen_session_ability_connection.cpp b/window_scene/screen_session_manager/src/connection/screen_session_ability_connection.cpp
index af55e74df936ee0d4326df298b46492c054fcb55..d67bddaa3679f4bbf352005262a6165140434f0e 100644
--- a/window_scene/screen_session_manager/src/connection/screen_session_ability_connection.cpp
+++ b/window_scene/screen_session_manager/src/connection/screen_session_ability_connection.cpp
@@ -223,6 +223,10 @@ bool ScreenSessionAbilityConnection::ScreenSessionConnectExtension(const std::st
     TLOGI(WmsLogTag::DMS, "bundleName:%{public}s, abilityName:%{public}s", bundleName.c_str(), abilityName.c_str());
     OHOS::sptr<OHOS::ISystemAbilityManager> systemAbilityManager =
         OHOS::SystemAbilityManagerClient::GetInstance().GetSystemAbilityManager();
+    if (systemAbilityManager == nullptr) {
+        TLOGE(WmsLogTag::DMS, "GetSystemAbilityManager failed");
+        return false;
+    }
     OHOS::sptr<OHOS::IRemoteObject> remoteObject =
         systemAbilityManager->GetSystemAbility(BUNDLE_MGR_SERVICE_SYS_ABILITY_ID);
     if (remoteObject == nullptr) {
diff --git a/window_scene/screen_session_manager_client/BUILD.gn b/window_scene/screen_session_manager_client/BUILD.gn
index d3bf76651e5041cad4664d2f5fc0cfc699c501b7..6257b70fab6ae127fe398d442b1833c211c1fb50 100644
--- a/window_scene/screen_session_manager_client/BUILD.gn
+++ b/window_scene/screen_session_manager_client/BUILD.gn
@@ -38,6 +38,7 @@ ohos_shared_library("screen_session_manager_client") {
   }
   sources = [
     "../screen_session_manager/src/zidl/screen_session_manager_proxy.cpp",
+    "../session_manager/src/ffrt_queue_helper.cpp",
     "src/screen_session_manager_client.cpp",
     "src/zidl/screen_session_manager_client_stub.cpp",
   ]
@@ -52,6 +53,7 @@ ohos_shared_library("screen_session_manager_client") {
 
   external_deps = [
     "c_utils:utils",
+    "ffrt:libffrt",
     "graphic_2d:librender_service_base",
     "graphic_2d:librender_service_client",
     "hilog:libhilog",
diff --git a/window_scene/screen_session_manager_client/include/screen_session_manager_client.h b/window_scene/screen_session_manager_client/include/screen_session_manager_client.h
index be9a5f96651fcc071a25152ddb562aba788f049c..0eef72198f91d4f514a2bea53683b1ce76125a16 100644
--- a/window_scene/screen_session_manager_client/include/screen_session_manager_client.h
+++ b/window_scene/screen_session_manager_client/include/screen_session_manager_client.h
@@ -26,6 +26,7 @@
 #include "display_change_info.h"
 #include "dm_common.h"
 #include "session/screen/include/screen_session.h"
+#include "session_manager/include/ffrt_queue_helper.h"
 #include "interfaces/include/ws_common.h"
 #include "wm_single_instance.h"
 #include "zidl/screen_session_manager_client_stub.h"
@@ -180,6 +181,8 @@ private:
 
     sptr<IScreenSessionManager> screenSessionManager_;
 
+    std::shared_ptr<FfrtQueueHelper> ffrtQueueHelper_ = std::make_shared<FfrtQueueHelper>();
+
     IScreenConnectionListener* screenConnectionListener_;
     sptr<IScreenConnectionChangeListener> screenConnectionChangeListener_;
     sptr<IDisplayChangeListener> displayChangeListener_;
diff --git a/window_scene/screen_session_manager_client/src/screen_session_manager_client.cpp b/window_scene/screen_session_manager_client/src/screen_session_manager_client.cpp
index 6c3a7e408dc246bf2aba2d7cab7a6e4012604e72..27998b4db258a72991652a94bfde07f3cc2f3979 100644
--- a/window_scene/screen_session_manager_client/src/screen_session_manager_client.cpp
+++ b/window_scene/screen_session_manager_client/src/screen_session_manager_client.cpp
@@ -1249,12 +1249,17 @@ std::string ScreenSessionManagerClient::OnDumperClientScreenSessions()
 
 void ScreenSessionManagerClient::SetDefaultMultiScreenModeWhenSwitchUser()
 {
-    if (!screenSessionManager_) {
-        TLOGE(WmsLogTag::DMS, "screenSessionManager_ is null");
+    wptr<IScreenSessionManager> screenSessionManagerWptr = screenSessionManager_;
+    auto task = [screenSessionManagerWptr] {
+        auto screenSessionManager = screenSessionManagerWptr.promote();
+        if (!screenSessionManager) {
+            TLOGE(WmsLogTag::DMS, "screenSessionManager_ is null");
+            return;
+        }
+        screenSessionManager->SetDefaultMultiScreenModeWhenSwitchUser();
         return;
-    }
-    screenSessionManager_->SetDefaultMultiScreenModeWhenSwitchUser();
-    return;
+    };
+    ffrtQueueHelper_->SubmitTask(std::move(task));
 }
 
 void ScreenSessionManagerClient::NotifyExtendScreenCreateFinish()