diff --git a/src/main/java/com/sqx/modules/utils/PeriodUtil.java b/src/main/java/com/sqx/modules/utils/PeriodUtil.java
index f0bd906..4f68b47 100644
--- a/src/main/java/com/sqx/modules/utils/PeriodUtil.java
+++ b/src/main/java/com/sqx/modules/utils/PeriodUtil.java
@@ -61,7 +61,7 @@ public class PeriodUtil {
     //传入时间计算上一期时间
     public static Period previousIssue(Date date) {
         //取当前时间的上一个周期
-        Date previousDate =  DateUtil.offsetDay(date,-10);
+        Date previousDate =  DateUtil.offsetDay(date,-15);
         //获取上一个周期的开始以及结束时间
         Period period = obtainCycle(previousDate);
         return period;