diff --git a/OpenAuth.App/BaseApp/SysGroupManager/SysGroupApp.cs b/OpenAuth.App/BaseApp/SysGroupManager/SysGroupApp.cs
index eb8c6d3..fdc665e 100644
--- a/OpenAuth.App/BaseApp/SysGroupManager/SysGroupApp.cs
+++ b/OpenAuth.App/BaseApp/SysGroupManager/SysGroupApp.cs
@@ -193,7 +193,7 @@ namespace OpenAuth.App.BaseApp.SysGroupManager
                     throw new Exception("成员" + names + "已分配小组，勿重复分配");
                 }
                 await uwo.SysGroupuser.DeleteAsync(r => r.GroupId == model.GroupId);
-                await uwo.SysGroupuser.InsertRangeAsync(model.UserIds.Select(a => new SysGroupuser { GroupId = model.GroupId, UserId = a }).ToList());
+                await uwo.SysGroupuser.InsertRangeAsync(model.UserIds.Distinct().Select(a => new SysGroupuser { GroupId = model.GroupId, UserId = a }).ToList());
                 var flag = uwo.Commit();
                 return new Response<bool>
                 {