diff --git a/IRaCIS.Core.Application/Service/SiteSurvey/TrialSiteUserSurveyService.cs b/IRaCIS.Core.Application/Service/SiteSurvey/TrialSiteUserSurveyService.cs
index 4e3593cce..958ced908 100644
--- a/IRaCIS.Core.Application/Service/SiteSurvey/TrialSiteUserSurveyService.cs
+++ b/IRaCIS.Core.Application/Service/SiteSurvey/TrialSiteUserSurveyService.cs
@@ -56,6 +56,12 @@ namespace IRaCIS.Core.Application.Contracts
 
                 var item = addOrEditTrialSiteUserSurvey;
 
+                if (item.UserTypeId == null)
+                {
+                    throw new BusinessValidationFailedException(_localizer["SystemCommon_WebErrorArgument"]);
+                }
+
+
                 //找下系统中是否存在该用户类型的 并且邮箱 或者手机的账户
                 var sysUserInfo = await _identityUserRepository.Where(t => t.EMail == item.Email,true).Include(t => t.UserRoleList).FirstOrDefaultAsync();