diff --git a/cpp/wedpr-computing/ppc-mpc/src/Common.h b/cpp/wedpr-computing/ppc-mpc/src/Common.h
index 8734cc53..b0709f10 100644
--- a/cpp/wedpr-computing/ppc-mpc/src/Common.h
+++ b/cpp/wedpr-computing/ppc-mpc/src/Common.h
@@ -50,15 +50,19 @@ struct JobStatus
 {
     std::string jobId;
     int code;
+    std::string status;
     std::string message;
     int64_t startTimeMs;
     int64_t timeCostMs;
 };
 
+const std::string MPC_JOB_RUNNNING = "RUNNING";
+const std::string MPC_JOB_COMPLETED = "COMPLETED";
+const std::string MPC_JOB_FAILED = "FAILED";
+const std::string MPC_JOB_KILLED = "KILLED";
+
 const int MPC_SUCCESS = 0;
-const int MPC_RUNNING = 1;
-const int MPC_DUPLICATED = 2;
-const int MPC_KILLED = 3;
+const int MPC_DUPLICATED = 1;
 const int MPC_FAILED = -1;
 
 const std::string PATH_SEPARATOR = "/";
diff --git a/cpp/wedpr-computing/ppc-mpc/src/MPCService.cpp b/cpp/wedpr-computing/ppc-mpc/src/MPCService.cpp
index 07c20a2c..8e7b6108 100644
--- a/cpp/wedpr-computing/ppc-mpc/src/MPCService.cpp
+++ b/cpp/wedpr-computing/ppc-mpc/src/MPCService.cpp
@@ -59,7 +59,7 @@ bool MPCService::addJobIfNotRunning(const JobInfo& jobInfo)
                 << LOG_KV("code", it->second.code)
                 << LOG_KV("message", it->second.message);
 
-        if (it->second.code == MPC_RUNNING) 
+        if (it->second.status == MPC_JOB_RUNNNING) 
         {
             // job is running
             return false;
@@ -70,7 +70,7 @@ bool MPCService::addJobIfNotRunning(const JobInfo& jobInfo)
 
     JobStatus jobStatus;
     jobStatus.jobId = jobInfo.jobId;
-    jobStatus.code = MPC_RUNNING;
+    jobStatus.status = MPC_JOB_RUNNNING;
     jobStatus.message = "job is running";
     jobStatus.startTimeMs = utcSteadyTime();
     jobStatus.timeCostMs = 0;
@@ -123,7 +123,7 @@ void MPCService::onSuccess(const std::string &jobId, const std::string &msg)
     }
 
     JobStatus &jobStatus = it->second;
-    jobStatus.code = MPC_SUCCESS;
+    jobStatus.status = MPC_JOB_COMPLETED;
     jobStatus.message = msg;
     jobStatus.timeCostMs = utcSteadyTime() - jobStatus.startTimeMs;
 
@@ -148,7 +148,7 @@ void MPCService::onFailed(const std::string &jobId, const std::string &msg)
     }
 
     JobStatus &jobStatus = it->second;
-    jobStatus.code = MPC_FAILED;
+    jobStatus.status = MPC_JOB_FAILED;
     jobStatus.message = msg;
     jobStatus.timeCostMs = utcSteadyTime() - jobStatus.startTimeMs;
 
@@ -173,7 +173,7 @@ void MPCService::onKill(const std::string &jobId, const std::string &msg)
     }
 
     JobStatus &jobStatus = it->second;
-    jobStatus.code = MPC_KILLED;
+    jobStatus.status = MPC_JOB_KILLED;
     jobStatus.message = msg;
     jobStatus.timeCostMs = utcSteadyTime() - jobStatus.startTimeMs;
 
@@ -268,13 +268,15 @@ void MPCService::queryMpcRpc(Json::Value const& request, RespFunc func)
     Json::Value response;
     if (result)
     {
-        response["code"] = jobStatus.code;
+        response["code"] = MPC_SUCCESS;
+        response["status"] = jobStatus.status;
         response["message"] = jobStatus.message;
         response["timeCostMs"] = jobStatus.timeCostMs;
     } 
     else 
     {
         response["code"] = MPC_FAILED;
+        response["status"] = "";
         response["message"] = "job does not exist";
         response["timeCostMs"] = -1;
     }