diff --git a/detection/src/main/java/com/njcn/gather/plan/service/impl/AdPlanServiceImpl.java b/detection/src/main/java/com/njcn/gather/plan/service/impl/AdPlanServiceImpl.java
index 1655fe2b..9d20d947 100644
--- a/detection/src/main/java/com/njcn/gather/plan/service/impl/AdPlanServiceImpl.java
+++ b/detection/src/main/java/com/njcn/gather/plan/service/impl/AdPlanServiceImpl.java
@@ -398,6 +398,6 @@ public class AdPlanServiceImpl extends ServiceImpl<AdPlanMapper, AdPlan> impleme
      * @return
      */
     private Integer generateCode() {
-        return this.count() + 1;
+        return this.lambdaQuery().select(AdPlan::getCode).orderByDesc(AdPlan::getCode).last("LIMIT 1").one().getCode() + 1;
     }
 }