diff --git a/services/include/sensor_service.h b/services/include/sensor_service.h
index 182d984b2669d7b662fde9b7570bd6471e821f29..9e83d3540ebdf21c9691f0a87a69e7198d99fab7 100644
--- a/services/include/sensor_service.h
+++ b/services/include/sensor_service.h
@@ -108,6 +108,7 @@ private:
     SensorManager &sensorManager_ = SensorManager::GetInstance();
     std::mutex uidLock_;
     // death recipient of sensor client
+    std::mutex clientDeathObserverMutex_;
     sptr<IRemoteObject::DeathRecipient> clientDeathObserver_ = nullptr;
     std::shared_ptr<PermStateChangeCb> permStateChangeCb_ = nullptr;
     ErrCode SaveSubscriber(int32_t sensorId, int64_t samplingPeriodNs, int64_t maxReportDelayNs);
diff --git a/services/src/sensor_service.cpp b/services/src/sensor_service.cpp
index 5979dcf565411eff4ae5de3a28da51149f6144e5..9f90ffd88dd3eabb6d147a068c9c46538342121f 100644
--- a/services/src/sensor_service.cpp
+++ b/services/src/sensor_service.cpp
@@ -401,6 +401,7 @@ void SensorService::RegisterClientDeathRecipient(sptr<IRemoteObject> sensorClien
 {
     CALL_LOG_ENTER;
     CHKPV(sensorClient);
+    std::lock_guard<std::mutex> clientDeathObserverLock(clientDeathObserverMutex_);
     if (clientDeathObserver_ == nullptr) {
         clientDeathObserver_ = new (std::nothrow) DeathRecipientTemplate(*const_cast<SensorService *>(this));
         CHKPV(clientDeathObserver_);
@@ -422,6 +423,7 @@ void SensorService::UnregisterClientDeathRecipient(sptr<IRemoteObject> sensorCli
         SEN_HILOGD("Can't unregister client death recipient");
         return;
     }
+    std::lock_guard<std::mutex> clientDeathObserverLock(clientDeathObserverMutex_);
     sensorClient->RemoveDeathRecipient(clientDeathObserver_);
     clientInfo_.DestroyClientPid(sensorClient);
 }