diff --git a/src/main/java/art/kexue/sxwz/service/impl/SysNotificationServiceImpl.java b/src/main/java/art/kexue/sxwz/service/impl/SysNotificationServiceImpl.java
index d672f54..aab35d7 100644
--- a/src/main/java/art/kexue/sxwz/service/impl/SysNotificationServiceImpl.java
+++ b/src/main/java/art/kexue/sxwz/service/impl/SysNotificationServiceImpl.java
@@ -1,5 +1,6 @@
 package art.kexue.sxwz.service.impl;
 
+import art.kexue.sxwz.common.util.IDUtils;
 import art.kexue.sxwz.entity.EduCourseStudent;
 import art.kexue.sxwz.entity.SysNotification;
 import art.kexue.sxwz.entity.SysUser;
@@ -219,7 +220,7 @@ public class SysNotificationServiceImpl implements SysNotificationService {
                                               String content, Integer type, Long senderId,
                                               String senderName, Integer targetType) {
         SysNotification notification = new SysNotification();
-        notification.setId(System.currentTimeMillis());
+        notification.setId(IDUtils.getSnowflakeId());
         notification.setSchoolId(schoolId);
         notification.setUserId(userId);
         notification.setTitle(title);