diff --git a/ruoyi-admin/src/main/java/com/ruoyi/web/controller/system/SysNoticeController.java b/ruoyi-admin/src/main/java/com/ruoyi/web/controller/system/SysNoticeController.java
index 3c73c51..45ae961 100644
--- a/ruoyi-admin/src/main/java/com/ruoyi/web/controller/system/SysNoticeController.java
+++ b/ruoyi-admin/src/main/java/com/ruoyi/web/controller/system/SysNoticeController.java
@@ -138,7 +138,18 @@ public class SysNoticeController extends BaseController
 
         Map<String, List<SysNoticeUser>> groupedByNoticeType = list.stream()
                 .collect(Collectors.groupingBy(SysNoticeUser::getSendTimeFormat));
-        for(String key:groupedByNoticeType.keySet()){
+
+        // 使用TreeMap并提供一个Comparator用于排序key
+        Map<String, List<SysNoticeUser>> sortedMap = new TreeMap<>(new Comparator<String>() {
+            @Override
+            public int compare(String k1, String k2) {
+                // 降序排序
+                return k2.compareTo(k1);
+            }
+        });
+        sortedMap.putAll(groupedByNoticeType);
+
+        for(String key:sortedMap.keySet()){
             List<SysNoticeUser> lt =  groupedByNoticeType.get(key);
             lt.sort((t1, t2) -> t2.getSendTime().compareTo(t1.getSendTime()));
             map = new HashMap<>();