diff --git a/interfaces/cj/kits/src/device_manager_utils.cpp b/interfaces/cj/kits/src/device_manager_utils.cpp
index f7c89749f28f9abca65671017c04a5def64a1415..b81e2ed43ae16f26c7919666912d103d1d9ba148 100644
--- a/interfaces/cj/kits/src/device_manager_utils.cpp
+++ b/interfaces/cj/kits/src/device_manager_utils.cpp
@@ -188,23 +188,23 @@ void DmFfiBindTargetCallback::OnBindResult(const PeerTargetId &targetId, int32_t
 const std::string &GetDeviceTypeById(DmDeviceType type)
 {
     const static std::pair<const DmDeviceType, const std::string &> mapArray[] = {
-        {DEVICE_TYPE_UNKNOWN, DEVICE_TYPE_UNKNOWN_STRING},
-        {DEVICE_TYPE_PHONE, DEVICE_TYPE_PHONE_STRING},
-        {DEVICE_TYPE_PAD, DEVICE_TYPE_PAD_STRING},
-        {DEVICE_TYPE_TV, DEVICE_TYPE_TV_STRING},
-        {DEVICE_TYPE_CAR, DEVICE_TYPE_CAR_STRING},
-        {DEVICE_TYPE_WATCH, DEVICE_TYPE_WATCH_STRING},
-        {DEVICE_TYPE_WIFI_CAMERA, DEVICE_TYPE_WIFICAMERA_STRING},
-        {DEVICE_TYPE_PC, DEVICE_TYPE_PC_STRING},
-        {DEVICE_TYPE_SMART_DISPLAY, DEVICE_TYPE_SMART_DISPLAY_STRING},
-        {DEVICE_TYPE_2IN1, DEVICE_TYPE_2IN1_STRING},
+        {DEVICE_TYPE_UNKNOWN, std::string(DEVICE_TYPE_UNKNOWN_STRING)},
+        {DEVICE_TYPE_PHONE, std::string(DEVICE_TYPE_PHONE_STRING)},
+        {DEVICE_TYPE_PAD, std::string(DEVICE_TYPE_PAD_STRING)},
+        {DEVICE_TYPE_TV, std::string(DEVICE_TYPE_TV_STRING)},
+        {DEVICE_TYPE_CAR, std::string(DEVICE_TYPE_CAR_STRING)},
+        {DEVICE_TYPE_WATCH, std::string(DEVICE_TYPE_WATCH_STRING)},
+        {DEVICE_TYPE_WIFI_CAMERA, std::string(DEVICE_TYPE_WIFICAMERA_STRING)},
+        {DEVICE_TYPE_PC, std::string(DEVICE_TYPE_PC_STRING)},
+        {DEVICE_TYPE_SMART_DISPLAY, std::string(DEVICE_TYPE_SMART_DISPLAY_STRING)},
+        {DEVICE_TYPE_2IN1, std::string(DEVICE_TYPE_2IN1_STRING)},
     };
     for (const auto& item : mapArray) {
         if (item.first == type) {
             return item.second;
         }
     }
-    return DEVICE_TYPE_UNKNOWN_STRING;
+    return std::string(DEVICE_TYPE_UNKNOWN_STRING);
 }
 
 char *MallocCStr(const char *in)
diff --git a/interfaces/inner_kits/native_cpp/include/dm_device_info.h b/interfaces/inner_kits/native_cpp/include/dm_device_info.h
index 00d087fcbd26773ccd73e26acac0b5785ad89e6a..4fa27ac36f94bf7aeb2bae477a1892d2cfeea2d8 100644
--- a/interfaces/inner_kits/native_cpp/include/dm_device_info.h
+++ b/interfaces/inner_kits/native_cpp/include/dm_device_info.h
@@ -347,16 +347,16 @@ typedef enum {
     MAX = 9,
 } DmCommonNotifyEvent;
 
-const std::string DEVICE_TYPE_UNKNOWN_STRING = "UNKNOWN";
-const std::string DEVICE_TYPE_PHONE_STRING = "PHONE";
-const std::string DEVICE_TYPE_PAD_STRING = "PAD";
-const std::string DEVICE_TYPE_TV_STRING = "TV";
-const std::string DEVICE_TYPE_CAR_STRING = "CAR";
-const std::string DEVICE_TYPE_WATCH_STRING = "WATCH";
-const std::string DEVICE_TYPE_WIFICAMERA_STRING = "WiFiCamera";
-const std::string DEVICE_TYPE_PC_STRING = "PC";
-const std::string DEVICE_TYPE_SMART_DISPLAY_STRING = "SMART_DISPLAY";
-const std::string DEVICE_TYPE_2IN1_STRING = "2IN1";
+constexpr const char* DEVICE_TYPE_UNKNOWN_STRING = "UNKNOWN";
+constexpr const char* DEVICE_TYPE_PHONE_STRING = "PHONE";
+constexpr const char* DEVICE_TYPE_PAD_STRING = "PAD";
+constexpr const char* DEVICE_TYPE_TV_STRING = "TV";
+constexpr const char* DEVICE_TYPE_CAR_STRING = "CAR";
+constexpr const char* DEVICE_TYPE_WATCH_STRING = "WATCH";
+constexpr const char* DEVICE_TYPE_WIFICAMERA_STRING = "WiFiCamera";
+constexpr const char* DEVICE_TYPE_PC_STRING = "PC";
+constexpr const char* DEVICE_TYPE_SMART_DISPLAY_STRING = "SMART_DISPLAY";
+constexpr const char* DEVICE_TYPE_2IN1_STRING = "2IN1";
 
 typedef struct DmAccessCaller {
     std::string accountId;
diff --git a/interfaces/kits/js4.0/src/dm_native_util.cpp b/interfaces/kits/js4.0/src/dm_native_util.cpp
index 8b08c668a1d786f0b71cc9f4ef85c5d12ca1cbbe..da5e313cd9a39064b39dbb0e8228b6d725af1316 100644
--- a/interfaces/kits/js4.0/src/dm_native_util.cpp
+++ b/interfaces/kits/js4.0/src/dm_native_util.cpp
@@ -127,23 +127,23 @@ int32_t GetIntFromJsObj(const napi_env &env, const napi_value &object, const std
 std::string GetDeviceTypeById(DmDeviceType type)
 {
     const static std::pair<DmDeviceType, std::string> mapArray[] = {
-        {DEVICE_TYPE_UNKNOWN, DEVICE_TYPE_UNKNOWN_STRING},
-        {DEVICE_TYPE_PHONE, DEVICE_TYPE_PHONE_STRING},
-        {DEVICE_TYPE_PAD, DEVICE_TYPE_PAD_STRING},
-        {DEVICE_TYPE_TV, DEVICE_TYPE_TV_STRING},
-        {DEVICE_TYPE_CAR, DEVICE_TYPE_CAR_STRING},
-        {DEVICE_TYPE_WATCH, DEVICE_TYPE_WATCH_STRING},
-        {DEVICE_TYPE_WIFI_CAMERA, DEVICE_TYPE_WIFICAMERA_STRING},
-        {DEVICE_TYPE_PC, DEVICE_TYPE_PC_STRING},
-        {DEVICE_TYPE_SMART_DISPLAY, DEVICE_TYPE_SMART_DISPLAY_STRING},
-        {DEVICE_TYPE_2IN1, DEVICE_TYPE_2IN1_STRING},
+        {DEVICE_TYPE_UNKNOWN, std::string(DEVICE_TYPE_UNKNOWN_STRING)},
+        {DEVICE_TYPE_PHONE, std::string(DEVICE_TYPE_PHONE_STRING)},
+        {DEVICE_TYPE_PAD, std::string(DEVICE_TYPE_PAD_STRING)},
+        {DEVICE_TYPE_TV, std::string(DEVICE_TYPE_TV_STRING)},
+        {DEVICE_TYPE_CAR, std::string(DEVICE_TYPE_CAR_STRING)},
+        {DEVICE_TYPE_WATCH, std::string(DEVICE_TYPE_WATCH_STRING)},
+        {DEVICE_TYPE_WIFI_CAMERA, std::string(DEVICE_TYPE_WIFICAMERA_STRING)},
+        {DEVICE_TYPE_PC, std::string(DEVICE_TYPE_PC_STRING)},
+        {DEVICE_TYPE_SMART_DISPLAY, std::string(DEVICE_TYPE_SMART_DISPLAY_STRING)},
+        {DEVICE_TYPE_2IN1, std::string(DEVICE_TYPE_2IN1_STRING)},
     };
     for (const auto& item : mapArray) {
         if (item.first == type) {
             return item.second;
         }
     }
-    return DEVICE_TYPE_UNKNOWN_STRING;
+    return std::string(DEVICE_TYPE_UNKNOWN_STRING);
 }
 
 bool CheckArgsVal(napi_env env, bool assertion, const std::string &param, const std::string &msg)