diff --git a/src/main/java/com/peanut/modules/common/service/impl/ClassEntityServiceImpl.java b/src/main/java/com/peanut/modules/common/service/impl/ClassEntityServiceImpl.java
index c54e9753..6047dc0d 100644
--- a/src/main/java/com/peanut/modules/common/service/impl/ClassEntityServiceImpl.java
+++ b/src/main/java/com/peanut/modules/common/service/impl/ClassEntityServiceImpl.java
@@ -642,7 +642,8 @@ public class ClassEntityServiceImpl extends ServiceImpl<ClassEntityDao, ClassEnt
             result.put("examStartTime",DateUtils.stringToDate(DateUtils.format(examStartTime),"yyyy-MM-dd"));
             Date examEndTime = DateUtils.addDateDays(classEntity.getStartTime(),classModel.getDays()-1+classModel.getExamDays());
             result.put("examEndTime",DateUtils.stringToDate(DateUtils.format(examEndTime)+" 23:59:59","yyyy-MM-dd HH:mm:ss"));
-            result.put("examEndDays",Math.ceil((examStartTime.getTime()-new Date().getTime())/60/60/24/1000));
+            double d = Math.ceil((examStartTime.getTime()-new Date().getTime())/60/60/24/1000);
+            result.put("examEndDays",d>=0?d:0);
         }
         result.put("courses",courses);
         result.put("admins",admins);