diff --git a/examples/distributedb/test/distributedtest/common/distribute_demo_agent.cpp b/examples/distributedb/test/distributedtest/common/distribute_demo_agent.cpp
index 95dab2bc559b84e81ae266e7a1548826e1161287..b58239eed41e18bb8aaad743cde2eec0101a7be0 100644
--- a/examples/distributedb/test/distributedtest/common/distribute_demo_agent.cpp
+++ b/examples/distributedb/test/distributedtest/common/distribute_demo_agent.cpp
@@ -186,8 +186,16 @@ int DistributeDemoAgent::AddTwoValue(const std::string &strArgs, int argsLen, co
     int val1 = 0;
     int val2 = 0;
     int val3 = 0;
-    sscanf_s(strArgs.c_str(), "%d %d", &val1, &val2);
-    sscanf_s(strExpectValue.c_str(), "%d", &val3);
+    ret1 = sscanf_s(strArgs.c_str(), "%d %d", &val1, &val2);
+    if (ret1 == -1) {
+        HiLog::Error(LABEL, "sccanf_s failed. ret1 == -1.");
+        return 0;
+    }
+    ret2 = sscanf_s(strExpectValue.c_str(), "%d", &val3);
+    if (ret2 == -1) {
+        HiLog::Error(LABEL, "sccanf_s failed. ret2 == -1.");
+        return 0;
+    }
     EXPECT_TRUE(val3 == (val1 + val2));
     return val1 + val2;
 }