diff --git a/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/ProcessDefinitionServiceImpl.java b/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/ProcessDefinitionServiceImpl.java
index f6c331d249..741224039b 100644
--- a/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/ProcessDefinitionServiceImpl.java
+++ b/dolphinscheduler-api/src/main/java/org/apache/dolphinscheduler/api/service/impl/ProcessDefinitionServiceImpl.java
@@ -162,6 +162,7 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.web.multipart.MultipartFile;
 
+import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
 import com.baomidou.mybatisplus.core.metadata.IPage;
 import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import com.fasterxml.jackson.databind.JsonNode;
@@ -593,12 +594,15 @@ public class ProcessDefinitionServiceImpl extends BaseServiceImpl implements Pro
                 .stream()
                 .collect(Collectors.toMap(Schedule::getProcessDefinitionCode, Function.identity()));
 
+        Map<Integer, String> userMap = userMapper.selectList(new QueryWrapper<>()).stream()
+                .collect(Collectors.toMap(User::getId, User::getUserName));
+
         for (ProcessDefinition pd : processDefinitions) {
             // todo: use batch query
             ProcessDefinitionLog processDefinitionLog =
                     processDefinitionLogMapper.queryByDefinitionCodeAndVersion(pd.getCode(), pd.getVersion());
-            User user = userMapper.selectById(processDefinitionLog.getOperator());
-            pd.setModifyBy(user.getUserName());
+            pd.setModifyBy(userMap.get(processDefinitionLog.getOperator()));
+            pd.setUserName(userMap.get(pd.getUserId()));
             Schedule schedule = scheduleMap.get(pd.getCode());
             pd.setScheduleReleaseState(schedule == null ? null : schedule.getReleaseState());
         }
diff --git a/dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/ProcessDefinitionServiceTest.java b/dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/ProcessDefinitionServiceTest.java
index 5ada289227..558bbdf39d 100644
--- a/dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/ProcessDefinitionServiceTest.java
+++ b/dolphinscheduler-api/src/test/java/org/apache/dolphinscheduler/api/service/ProcessDefinitionServiceTest.java
@@ -67,6 +67,7 @@ import org.apache.dolphinscheduler.dao.mapper.ProjectMapper;
 import org.apache.dolphinscheduler.dao.mapper.ScheduleMapper;
 import org.apache.dolphinscheduler.dao.mapper.TaskDefinitionMapper;
 import org.apache.dolphinscheduler.dao.mapper.TenantMapper;
+import org.apache.dolphinscheduler.dao.mapper.UserMapper;
 import org.apache.dolphinscheduler.dao.model.PageListingResult;
 import org.apache.dolphinscheduler.dao.repository.ProcessDefinitionDao;
 import org.apache.dolphinscheduler.dao.repository.TaskDefinitionLogDao;
@@ -171,6 +172,9 @@ public class ProcessDefinitionServiceTest extends BaseServiceTestTool {
     @Mock
     private WorkFlowLineageService workFlowLineageService;
 
+    @Mock
+    private UserMapper userMapper;
+
     protected User user;
     protected Exception exception;
     protected final static long projectCode = 1L;
@@ -224,6 +228,7 @@ public class ProcessDefinitionServiceTest extends BaseServiceTestTool {
     @Test
     public void testQueryProcessDefinitionListPaging() {
         Mockito.when(projectMapper.queryByCode(projectCode)).thenReturn(getProject(projectCode));
+        Mockito.when(userMapper.selectList(Mockito.any())).thenReturn(Lists.newArrayList());
 
         Project project = getProject(projectCode);
 
diff --git a/dolphinscheduler-dao/src/main/java/org/apache/dolphinscheduler/dao/entity/ProcessDefinition.java b/dolphinscheduler-dao/src/main/java/org/apache/dolphinscheduler/dao/entity/ProcessDefinition.java
index 27df7bd573..9304662342 100644
--- a/dolphinscheduler-dao/src/main/java/org/apache/dolphinscheduler/dao/entity/ProcessDefinition.java
+++ b/dolphinscheduler-dao/src/main/java/org/apache/dolphinscheduler/dao/entity/ProcessDefinition.java
@@ -121,7 +121,7 @@ public class ProcessDefinition {
     private int userId;
 
     /**
-     * user name
+     * create user name
      */
     @TableField(exist = false)
     private String userName;