diff --git a/backend/src/main/java/com/yfd/platform/system/service/impl/UserServiceImpl.java b/backend/src/main/java/com/yfd/platform/system/service/impl/UserServiceImpl.java
index 96172af7..64e6220e 100644
--- a/backend/src/main/java/com/yfd/platform/system/service/impl/UserServiceImpl.java
+++ b/backend/src/main/java/com/yfd/platform/system/service/impl/UserServiceImpl.java
@@ -641,11 +641,38 @@ public class UserServiceImpl extends ServiceImpl<SysUserMapper, SysUser> impleme
                                     Page<SysUser> page) {
         Page<SysUser> mapPage = sysUserMapper.queryUsers(orgid,
                 username, tenantId, page);
-        mapPage.getRecords().forEach(record -> {
-            String id = record.getId();
-            List<SysRole> sysRoles = sysRoleMapper.getRoleByUserId(id);
-            record.setRoles(sysRoles);
-        });
+        List<SysUser> records = mapPage.getRecords();
+        if (records.isEmpty()) {
+            return mapPage;
+        }
+
+        // 收集所有用户ID，一次批量查询角色（替代 N+1 查询）
+        List<String> userIds = records.stream()
+                .map(SysUser::getId)
+                .collect(Collectors.toList());
+        List<Map<String, Object>> allRoleMaps = sysRoleMapper.getUserRolesByUserIds(userIds);
+
+        // 按 userId 分组，将 Map 转为 SysRole 对象
+        Map<String, List<SysRole>> userRoleMap = new HashMap<>();
+        if (allRoleMaps != null) {
+            for (Map<String, Object> roleMap : allRoleMaps) {
+                String userId = (String) roleMap.get("userId");
+                if (userId == null) continue;
+                SysRole role = new SysRole();
+                role.setId((String) roleMap.get("id"));
+                role.setRolecode((String) roleMap.get("rolecode"));
+                role.setRolename((String) roleMap.get("rolename"));
+                role.setLevel((String) roleMap.get("level"));
+                role.setDescription((String) roleMap.get("description"));
+                role.setIsvaild((String) roleMap.get("isvaild"));
+                role.setOrgscope((String) roleMap.get("orgscope"));
+                role.setOptscope((String) roleMap.get("optscope"));
+                role.setBusscope((String) roleMap.get("busscope"));
+                userRoleMap.computeIfAbsent(userId, k -> new ArrayList<>()).add(role);
+            }
+        }
+
+        records.forEach(r -> r.setRoles(userRoleMap.getOrDefault(r.getId(), Collections.emptyList())));
         return mapPage;
     }