diff --git a/services/implementation/src/authentication_v2/dm_freeze_process.cpp b/services/implementation/src/authentication_v2/dm_freeze_process.cpp
index 9e7d4a1e3bb90ed0fffebe5a7364418026474a8a..7fbd667c0a2911e939f9eed6e7acc8a4502cbed5 100644
--- a/services/implementation/src/authentication_v2/dm_freeze_process.cpp
+++ b/services/implementation/src/authentication_v2/dm_freeze_process.cpp
@@ -42,6 +42,7 @@ constexpr int64_t MAX_FREEZE_DURATION_SEC = 10 * 60;
 
 DM_IMPLEMENT_SINGLE_INSTANCE(FreezeProcess);
 
+//LCOV_EXCL_START
 int32_t FreezeProcess::SyncFreezeData()
 {
     LOGI("called");
@@ -78,6 +79,7 @@ int32_t FreezeProcess::SyncFreezeData()
     LOGI("Sync freeze data success");
     return DM_OK;
 }
+//LCOV_EXCL_STOP
 
 int32_t FreezeProcess::ConvertJsonToDeviceFreezeState(const std::string &result, DeviceFreezeState &freezeStateObj)
 {
@@ -169,6 +171,7 @@ int32_t FreezeProcess::CleanFreezeRecord(int64_t nowTime)
     return DM_OK;
 }
 
+//LCOV_EXCL_START
 int32_t FreezeProcess::CleanBindFailedEvents(int64_t reservedDataTimeStamp)
 {
     std::lock_guard<std::mutex> lock(bindFailedEventsCacheMtx_);
@@ -204,6 +207,7 @@ int32_t FreezeProcess::CleanBindFailedEvents(int64_t reservedDataTimeStamp)
     LOGI("CleanBindFailedEvents success");
     return DM_OK;
 }
+//LCOV_EXCL_STOP
 
 int32_t FreezeProcess::CleanFreezeState(int64_t reservedDataTimeStamp)
 {
@@ -241,6 +245,7 @@ void FreezeProcess::ConvertDeviceFreezeStateToJson(const DeviceFreezeState &valu
     result = jsonObj.Dump();
 }
 
+//LCOV_EXCL_START
 int32_t FreezeProcess::DeleteFreezeRecord()
 {
     if (KVAdapterManager::GetInstance().DeleteFreezeData(FREEZE_STATE_KEY) != DM_OK) {
@@ -295,6 +300,7 @@ int32_t FreezeProcess::UpdateFreezeRecord()
     bindFailedEventsCache_ = bindFailedEventsTmp;
     return UpdateFreezeState(nowTime);
 }
+//LCOV_EXCL_STOP
 
 int32_t FreezeProcess::UpdateFreezeState(int64_t nowTime)
 {
diff --git a/services/implementation/src/dependency/hichain/hichain_connector.cpp b/services/implementation/src/dependency/hichain/hichain_connector.cpp
index 6b3fda504deb3002e48e2b7c6cfad164d6b3540e..fa3d0aef602c996a5f90243f5c123273c985a92e 100644
--- a/services/implementation/src/dependency/hichain/hichain_connector.cpp
+++ b/services/implementation/src/dependency/hichain/hichain_connector.cpp
@@ -899,6 +899,7 @@ int32_t HiChainConnector::GetGroupId(const std::string &userId, const int32_t gr
     return ERR_DM_FAILED;
 }
 
+//LCOV_EXCL_START
 int32_t HiChainConnector::ParseRemoteCredential(const int32_t groupType, const std::string &userId,
     const JsonObject &jsonDeviceList, std::string &params, int32_t &osAccountUserId)
 {
@@ -926,6 +927,7 @@ int32_t HiChainConnector::ParseRemoteCredential(const int32_t groupType, const s
     }
     return DM_OK;
 }
+//LCOV_EXCL_STOP
 
 int32_t HiChainConnector::addMultiMembers(const int32_t groupType, const std::string &userId,
     const JsonObject &jsonDeviceList)
diff --git a/services/implementation/src/dependency/softbus/softbus_connector.cpp b/services/implementation/src/dependency/softbus/softbus_connector.cpp
index 90606a916a10fd09fe3239f4c3b031ef976a5b52..ece9d9fe5bf7b91c130ac289897b89ff3a63f4ca 100644
--- a/services/implementation/src/dependency/softbus/softbus_connector.cpp
+++ b/services/implementation/src/dependency/softbus/softbus_connector.cpp
@@ -187,6 +187,7 @@ std::string SoftbusConnector::MatchTargetVersion(const std::string &localVersion
 }
 #endif
 
+//LCOV_EXCL_START
 int32_t SoftbusConnector::SyncLocalAclListProcess(const DevUserInfo &localDevUserInfo,
     const DevUserInfo &remoteDevUserInfo, std::string remoteAclList)
 {
@@ -235,6 +236,7 @@ int32_t SoftbusConnector::SyncLocalAclListProcess(const DevUserInfo &localDevUse
     return DM_OK;
 #endif
 }
+//LCOV_EXCL_STOP
 
 int32_t SoftbusConnector::GetAclListHash(const DevUserInfo &localDevUserInfo,
     const DevUserInfo &remoteDevUserInfo, std::string &aclList)
@@ -742,6 +744,7 @@ void SoftbusConnector::DeleteOffLineTimer(std::string &udidHash)
     }
 }
 
+//LCOV_EXCL_START
 bool SoftbusConnector::CheckIsNeedJoinLnn(const std::string &udid, const std::string &deviceId)
 {
     if (udid.empty() || deviceId.empty()) {
@@ -790,6 +793,7 @@ bool SoftbusConnector::CheckIsNeedJoinLnn(const std::string &udid, const std::st
     }
     return true;
 }
+//LCOV_EXCL_STOP
 
 // isHash：传入的deviceId是否为哈希值
 bool SoftbusConnector::CheckIsOnline(const std::string &targetDeviceIdHash, bool isHash)
diff --git a/services/service/src/relationshipsyncmgr/dm_comm_tool.cpp b/services/service/src/relationshipsyncmgr/dm_comm_tool.cpp
index 088d4e61c69e6213baedd49124667ae1330eb314..50528018fa485c7e316ce638aa135f7aaea65e0d 100644
--- a/services/service/src/relationshipsyncmgr/dm_comm_tool.cpp
+++ b/services/service/src/relationshipsyncmgr/dm_comm_tool.cpp
@@ -391,6 +391,7 @@ void DMCommTool::DMCommToolEventHandler::HandleLocalUserIdEvent(const std::share
     }
 }
 
+//LCOV_EXCL_START
 void DMCommTool::ProcessReceiveCommonEvent(const std::shared_ptr<InnerCommMsg> commMsg)
 {
     LOGI("start");
@@ -509,6 +510,7 @@ void DMCommTool::ProcessReceiveUserIdsEvent(const std::shared_ptr<InnerCommMsg>
             userIdsMsg.backgroundUserIds, rmtUdid);
     }
 }
+//LCOV_EXCL_STOP
 
 void DMCommTool::ProcessReceiveUninstAppEvent(const std::shared_ptr<InnerCommMsg> commMsg)
 {
@@ -783,6 +785,7 @@ void DMCommTool::RspUserStop(const std::string rmtNetworkId, int32_t socketId, i
     LOGI("success");
 }
 
+//LCOV_EXCL_START
 void DMCommTool::ProcessResponseUserStopEvent(const std::shared_ptr<InnerCommMsg> commMsg)
 {
     LOGI("start");
@@ -807,6 +810,7 @@ void DMCommTool::ProcessResponseUserStopEvent(const std::shared_ptr<InnerCommMsg
     std::string localUdid = static_cast<std::string>(localDeviceId);
     DeviceManagerService::GetInstance().HandleUserStop(stopUserId, localUdid, acceptEventUdids);
 }
+//LCOV_EXCL_STOP
 
 int32_t DMCommTool::SendLogoutAccountInfo(const std::string &rmtNetworkId,
     const std::string &accountId, int32_t userId)
@@ -850,6 +854,7 @@ int32_t DMCommTool::SendLogoutAccountInfo(const std::string &rmtNetworkId,
     return DM_OK;
 }
 
+//LCOV_EXCL_START
 void DMCommTool::ProcessReceiveLogoutEvent(const std::shared_ptr<InnerCommMsg> commMsg)
 {
     CHECK_NULL_VOID(commMsg);
@@ -883,6 +888,7 @@ void DMCommTool::ProcessReceiveLogoutEvent(const std::shared_ptr<InnerCommMsg> c
         rmtUdid, logoutAccountMsg.userId);
     LOGI("success.");
 }
+//LCOV_EXCL_STOP
 
 int32_t DMCommTool::StartCommonEvent(std::string commonEventType, EventCallback eventCallback)
 {
diff --git a/services/service/src/relationshipsyncmgr/dm_transport.cpp b/services/service/src/relationshipsyncmgr/dm_transport.cpp
index 4ddf272a6eb686f94f89cbb59dcf1e6792a60ac5..0254ede7511cb2550e54287695c8d69ba311616b 100644
--- a/services/service/src/relationshipsyncmgr/dm_transport.cpp
+++ b/services/service/src/relationshipsyncmgr/dm_transport.cpp
@@ -195,6 +195,7 @@ void OnBytes(int32_t socket, const void *data, uint32_t dataLen)
     dmCommToolSPtr->GetDMTransportPtr()->OnBytesReceived(socket, data, dataLen);
 }
 
+//LCOV_EXCL_START
 void OnMessage(int32_t socket, const void *data, uint32_t dataLen)
 {
     (void)socket;
@@ -218,6 +219,7 @@ void OnFile(int32_t socket, FileEvent *event)
     (void)event;
     LOGI("socket: %{public}d", socket);
 }
+//LCOV_EXCL_STOP
 
 void OnQos(int32_t socket, QoSEvent eventId, const QosTV *qos, uint32_t qosCount)
 {
@@ -242,6 +244,7 @@ ISocketListener iSocketListener = {
     .OnQos = OnQos
 };
 
+//LCOV_EXCL_START
 int32_t DMTransport::CreateServerSocket()
 {
     LOGI("CreateServerSocket start");
@@ -257,6 +260,7 @@ int32_t DMTransport::CreateServerSocket()
     LOGI("CreateServerSocket Finish, socket: %{public}d", socket);
     return socket;
 }
+//LCOV_EXCL_STOP
 
 int32_t DMTransport::CreateClientSocket(const std::string &rmtNetworkId)
 {
@@ -279,6 +283,7 @@ int32_t DMTransport::CreateClientSocket(const std::string &rmtNetworkId)
     return socket;
 }
 
+//LCOV_EXCL_START
 int32_t DMTransport::Init()
 {
     LOGI("Init DMTransport");
@@ -328,6 +333,7 @@ int32_t DMTransport::UnInit()
     }
     return DM_OK;
 }
+//LCOV_EXCL_STOP
 
 bool DMTransport::IsDeviceSessionOpened(const std::string &rmtNetworkId, int32_t &socketId)
 {
diff --git a/services/service/src/relationshipsyncmgr/dm_transport_msg.cpp b/services/service/src/relationshipsyncmgr/dm_transport_msg.cpp
index 2a0abcdc10e5dff055390734a3951f3750ed101a..5070b23d83d259845b15555f2f44676b491bba60 100644
--- a/services/service/src/relationshipsyncmgr/dm_transport_msg.cpp
+++ b/services/service/src/relationshipsyncmgr/dm_transport_msg.cpp
@@ -258,6 +258,7 @@ void ToJson(cJSON *jsonObject, const LogoutAccountMsg &accountInfo)
     cJSON_AddNumberToObject(jsonObject, DSOFTBUS_NOTIFY_USERID_KEY, accountInfo.userId);
 }
 
+//LCOV_EXCL_START
 void FromJson(const cJSON *jsonObject, LogoutAccountMsg &accountInfo)
 {
     if (jsonObject == nullptr) {
@@ -274,6 +275,7 @@ void FromJson(const cJSON *jsonObject, LogoutAccountMsg &accountInfo)
         accountInfo.userId = userIdObj->valueint;
     }
 }
+//LCOV_EXCL_STOP
 
 void ToJson(cJSON *jsonObject, const UninstAppMsg &uninstAppMsg)
 {
@@ -286,6 +288,7 @@ void ToJson(cJSON *jsonObject, const UninstAppMsg &uninstAppMsg)
     cJSON_AddNumberToObject(jsonObject, DSOFTBUS_NOTIFY_TOKENID_KEY, uninstAppMsg.tokenId_);
 }
 
+//LCOV_EXCL_START
 void FromJson(const cJSON *jsonObject, UninstAppMsg &uninstAppMsg)
 {
     if (jsonObject == nullptr) {
@@ -306,6 +309,7 @@ void FromJson(const cJSON *jsonObject, UninstAppMsg &uninstAppMsg)
         uninstAppMsg.tokenId_ = tokenIdObj->valueint;
     }
 }
+//LCOV_EXCL_STOP
 
 void ToJson(cJSON *jsonObject, const UnBindAppMsg &unBindAppMsg)
 {
diff --git a/test/commonfuzztest/hichainconnector_fuzzer/hichain_connector_fuzzer.cpp b/test/commonfuzztest/hichainconnector_fuzzer/hichain_connector_fuzzer.cpp
index dcc417f83afeac898a424a45cedbfd5167105c30..b76acc33684e1144f3b95b58bf837f5107649f74 100644
--- a/test/commonfuzztest/hichainconnector_fuzzer/hichain_connector_fuzzer.cpp
+++ b/test/commonfuzztest/hichainconnector_fuzzer/hichain_connector_fuzzer.cpp
@@ -421,6 +421,33 @@ void GetGroupInfoExtFuzzTest(const uint8_t* data, size_t size)
     std::shared_ptr<HiChainConnector> hichainConnector = std::make_shared<HiChainConnector>();
     hichainConnector->GetGroupInfoExt(userId, queryParams, groupList);
 }
+
+void DeleteHoDeviceFuzzTest(const uint8_t* data, size_t size)
+{
+    size_t count = 2;
+    if (data == nullptr || size < sizeof(size_t) * count + sizeof(int32_t) * count) {
+        return;
+    }
+    FuzzedDataProvider fdp(data, size);
+
+    size_t maxLength = 64;
+    size_t minCount = 1;
+    size_t maxCount = 10;
+    std::string peerUdid = fdp.ConsumeRandomLengthString(maxLength);
+    size_t foreGroundUserCount = fdp.ConsumeIntegralInRange<size_t>(minCount, maxCount);
+    std::vector<int32_t> foreGroundUserIds;
+    for (size_t i = 0; i < foreGroundUserCount; ++i) {
+        foreGroundUserIds.push_back(fdp.ConsumeIntegral<int32_t>());
+    }
+
+    size_t backGroundUserCount = fdp.ConsumeIntegralInRange<size_t>(minCount, maxCount);
+    std::vector<int32_t> backGroundUserIds;
+    for (size_t i = 0; i < backGroundUserCount; ++i) {
+        backGroundUserIds.push_back(fdp.ConsumeIntegral<int32_t>());
+    }
+    std::shared_ptr<HiChainConnector> hichainConnector = std::make_shared<HiChainConnector>();
+    hichainConnector->DeleteHoDevice(peerUdid, foreGroundUserIds, backGroundUserIds);
+}
 }
 }
 
@@ -436,5 +463,6 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
     OHOS::DistributedHardware::HiChainConnectorSixthFuzzTest(data, size);
     OHOS::DistributedHardware::HiChainConnectorSevenhFuzzTest(data, size);
     OHOS::DistributedHardware::GetGroupInfoExtFuzzTest(data, size);
+	OHOS::DistributedHardware::DeleteHoDeviceFuzzTest(data, size);
     return 0;
 }
\ No newline at end of file