diff --git a/IRaCIS.Core.Application/Service/Management/UserService.cs b/IRaCIS.Core.Application/Service/Management/UserService.cs
index 31f10f4b0..15a2a63be 100644
--- a/IRaCIS.Core.Application/Service/Management/UserService.cs
+++ b/IRaCIS.Core.Application/Service/Management/UserService.cs
@@ -990,7 +990,7 @@ namespace IRaCIS.Core.Application.Service
                 });
 
                 //超过90天没修改密码
-                if (_verifyConfig.CurrentValue.IsNeedChangePassWord && loginUser.LastChangePassWordTime != null && DateTime.Now.AddDays(-_verifyConfig.CurrentValue.ChangePassWordDays) > loginUser.LastChangePassWordTime.Value)
+                if (loginUser!= null&&_verifyConfig.CurrentValue.IsNeedChangePassWord && loginUser.LastChangePassWordTime != null && DateTime.Now.AddDays(-_verifyConfig.CurrentValue.ChangePassWordDays) > loginUser.LastChangePassWordTime.Value)
                 {
                     loginUser.NeedChangePassWord = true;
                 }