diff --git a/message-center-biz/src/main/java/com/yxt/messagecenter/biz/message/MessageService.java b/message-center-biz/src/main/java/com/yxt/messagecenter/biz/message/MessageService.java
index d25f37f..37199f7 100644
--- a/message-center-biz/src/main/java/com/yxt/messagecenter/biz/message/MessageService.java
+++ b/message-center-biz/src/main/java/com/yxt/messagecenter/biz/message/MessageService.java
@@ -436,7 +436,7 @@ public class MessageService extends MybatisBaseService<MessageMapper, Message> {
         MessageFlowVo ufVo = query.getUfVo();
         String procId = ufVo.getProcInsId();
         String procDefId = ufVo.getProcDefId();
-        Map<String, Object> appMap = query.getAppMap();
+        Map<String, Object> appMap = query.getAppMap() == null?new HashMap<>():query.getAppMap();
         String moduleName = query.getModuleName();
         String msgContent = query.getMsgContent();
         String msgTitle = query.getMsgTitle();