diff --git a/ssjygl-xsx-service/src/main/java/com/cowr/service/ssjygl/jobs/CheckUndonOrderclusterJob.java b/ssjygl-xsx-service/src/main/java/com/cowr/service/ssjygl/jobs/CheckUndonOrderclusterJob.java
index 036bb5a..70436dc 100644
--- a/ssjygl-xsx-service/src/main/java/com/cowr/service/ssjygl/jobs/CheckUndonOrderclusterJob.java
+++ b/ssjygl-xsx-service/src/main/java/com/cowr/service/ssjygl/jobs/CheckUndonOrderclusterJob.java
@@ -123,7 +123,7 @@ public class CheckUndonOrderclusterJob implements Job {
 
                     Calendar cold = Calendar.getInstance();
                     cold.setTime(ordercluster.getCutoffTime());
-                    cold.set(Calendar.DATE, 1);
+                    cold.add(Calendar.DATE, 1);
                     Date cutoff_time = cold.getTime();
 
                     Result ret;