diff --git a/services/distributeddataservice/app/src/backup_handler.cpp b/services/distributeddataservice/app/src/backup_handler.cpp
index ac0eae47cf4690f10e7e8179bdb21067a16bb936..1ef5a8596ab937a73f43e54f213d8a985db6b4ee 100644
--- a/services/distributeddataservice/app/src/backup_handler.cpp
+++ b/services/distributeddataservice/app/src/backup_handler.cpp
@@ -97,8 +97,11 @@ void BackupHandler::SingleKvStoreBackup(const MetaData &metaData)
     dbOption.createDirByStoreIdOnly = true;
     dbOption.secOption = KvStoreAppManager::ConvertSecurity(metaData.kvStoreMetaData.securityLevel);
 
-    auto *delegateMgr = new DistributedDB::KvStoreDelegateManager(metaData.kvStoreMetaData.appId,
+    auto *delegateMgr = new(std::nothrow) DistributedDB::KvStoreDelegateManager(metaData.kvStoreMetaData.appId,
         AccountDelegate::GetInstance()->GetCurrentAccountId(metaData.kvStoreMetaData.bundleName));
+    if (delegateMgr == nullptr) {
+        return;
+    }
 
     std::string appDataStoragePath = KvStoreAppManager::GetDataStoragePath(metaData.kvStoreMetaData.deviceAccountId,
         metaData.kvStoreMetaData.bundleName, backupPara.pathType);
diff --git a/services/distributeddataservice/app/src/query_helper.cpp b/services/distributeddataservice/app/src/query_helper.cpp
index cb56bf8a5349bb24e346dcdc34442482d41760cd..c11c417e93c45b418d7147a2170de8be6f487158 100644
--- a/services/distributeddataservice/app/src/query_helper.cpp
+++ b/services/distributeddataservice/app/src/query_helper.cpp
@@ -36,7 +36,7 @@ DistributedDB::Query QueryHelper::StringToDbQuery(const std::string &query, bool
 {
     ZLOGI("query string length:%{public}zu", query.length());
     DistributedDB::Query dbQuery = DistributedDB::Query::Select();
-    if (query.size() == 0) {
+    if (query.empty()) {
         ZLOGI("Query string is empty.");
         isSuccess = true;
         return dbQuery;
diff --git a/services/distributeddataservice/framework/include/serializable/serializable.h b/services/distributeddataservice/framework/include/serializable/serializable.h
index 6387e19aadd19639cbdd28f54b3f9d83d4c8c6e0..71fe7adfe3f44644e1a3c26cb21b7590dbf27667 100644
--- a/services/distributeddataservice/framework/include/serializable/serializable.h
+++ b/services/distributeddataservice/framework/include/serializable/serializable.h
@@ -74,7 +74,10 @@ protected:
         if (subNode.is_null()) {
             return false;
         }
-        value = new T();
+        value = new(std::nothrow) T();
+        if (value == nullptr) {
+            return false;
+        }
         bool result = GetValue(subNode, "", *value);
         if (!result) {
             delete value;