diff --git a/ruoyi-flyingbook/src/main/java/com/ruoyi/flyingbook/factory/LarkCallBackFactory.java b/ruoyi-flyingbook/src/main/java/com/ruoyi/flyingbook/factory/LarkCallBackFactory.java
index 11d1b82..8af931e 100644
--- a/ruoyi-flyingbook/src/main/java/com/ruoyi/flyingbook/factory/LarkCallBackFactory.java
+++ b/ruoyi-flyingbook/src/main/java/com/ruoyi/flyingbook/factory/LarkCallBackFactory.java
@@ -30,7 +30,7 @@ public class LarkCallBackFactory {
         String eventType = null;
         if (jsonObject.containsKey("header")){
             eventType = jsonObject.getJSONObject("header").getString("event_type");
-        }else{
+        }else if(jsonObject.containsKey("event")){
             eventType = jsonObject.getJSONObject("event").getString("type");
         }
         CallBackTypeEnum callBackTypeEnum = CallBackTypeEnum.getByCode(eventType);