diff --git a/services/screenservice/sourceservice/dscreenmgr/2.0/include/dscreen.h b/services/screenservice/sourceservice/dscreenmgr/2.0/include/dscreen.h
index eb09e2ba0125a5263c7fb70565c637c34fe6d0fe..00c439fa297005a87ff7599f3908870ec760c967 100644
--- a/services/screenservice/sourceservice/dscreenmgr/2.0/include/dscreen.h
+++ b/services/screenservice/sourceservice/dscreenmgr/2.0/include/dscreen.h
@@ -139,6 +139,7 @@ private:
 
     DScreenState curState_;
     std::mutex stateMtx_;
+    std::mutex ableMtx_;
     std::thread taskQueueThread_;
     std::condition_variable taskQueueCond_;
     std::mutex taskQueueMtx_;
diff --git a/services/screenservice/sourceservice/dscreenmgr/2.0/src/av_sender_engine_adapter.cpp b/services/screenservice/sourceservice/dscreenmgr/2.0/src/av_sender_engine_adapter.cpp
index 02ad243fcad553114bd12f4ccae71434e350c429..d708c4217247845e4211c34efac19fe668c80afc 100644
--- a/services/screenservice/sourceservice/dscreenmgr/2.0/src/av_sender_engine_adapter.cpp
+++ b/services/screenservice/sourceservice/dscreenmgr/2.0/src/av_sender_engine_adapter.cpp
@@ -80,11 +80,6 @@ int32_t AVTransSenderAdapter::Start()
         DHLOGE("start av transport sender engine failed, ret:%" PRId32, ret);
         return ERR_DH_AV_TRANS_START_FAILED;
     }
-    ret = WaitForAVTransStarted();
-    if (ret != DH_SUCCESS) {
-        DHLOGE("wait for start av transport sender engine failed, ret:%" PRId32, ret);
-        return ERR_DH_AV_TRANS_START_FAILED;
-    }
     DHLOGI("Start Success");
     return DH_SUCCESS;
 }
diff --git a/services/screenservice/sourceservice/dscreenmgr/2.0/src/dscreen.cpp b/services/screenservice/sourceservice/dscreenmgr/2.0/src/dscreen.cpp
index c93f59dcbcd302660d88519a1b7655504d69f955..7515f38a72b5ffea9f11ee5c90455e781f3338cd 100644
--- a/services/screenservice/sourceservice/dscreenmgr/2.0/src/dscreen.cpp
+++ b/services/screenservice/sourceservice/dscreenmgr/2.0/src/dscreen.cpp
@@ -129,7 +129,9 @@ void DScreen::HandleEnable(const std::string &param, const std::string &taskId)
         DHLOGE("DScreen::HandleEnable, dscreenCallback_ is nullptr");
         return;
     }
-    if ((curState_ == ENABLED) || (curState_ == ENABLING) || (curState_ == CONNECTING) || (curState_ == CONNECTED)) {
+    std::lock_guard<std::mutex> lock(ableMtx_);
+    if ((curState_ == ENABLED) || (curState_ == ENABLING) || (curState_ == CONNECTING) ||
+         (curState_ == CONNECTED)) {
         dscreenCallback_->OnRegResult(shared_from_this(), taskId, DH_SUCCESS, "dscreen enable success.");
         return;
     }