diff --git a/zc-business/src/main/resources/mapper/business/DcEventMapper.xml b/zc-business/src/main/resources/mapper/business/DcEventMapper.xml
index 7d5f9ab8..d50cb525 100644
--- a/zc-business/src/main/resources/mapper/business/DcEventMapper.xml
+++ b/zc-business/src/main/resources/mapper/business/DcEventMapper.xml
@@ -748,7 +748,7 @@
     </select>
 
     <select id="getProcessNode" resultType="java.util.Map">
-        select t2.node_node nodeNode,t2.process_node processNode,date_format(t3.operation_time,'%Y-%m-%d %H:%i:%s') operationTime,
+        select t2.node_node nodeNode,t2.process_node processNode,ifnull(date_format(t3.operation_time,'%Y-%m-%d %H:%i:%s'),'') operationTime,
             case when ISNULL(t3.id) then '0' else '1' end status
         from dc_event t1
         LEFT JOIN dc_process_config t2 on t1.event_type = t2.event_type