diff --git a/IRaCIS.Core.Application/Service/TrialSiteUser/TrialMaintenanceService.cs b/IRaCIS.Core.Application/Service/TrialSiteUser/TrialMaintenanceService.cs
index 8acfa26dc..6050eed50 100644
--- a/IRaCIS.Core.Application/Service/TrialSiteUser/TrialMaintenanceService.cs
+++ b/IRaCIS.Core.Application/Service/TrialSiteUser/TrialMaintenanceService.cs
@@ -35,6 +35,9 @@ namespace IRaCIS.Core.Application.Service
         [HttpPost]
         public async Task<IResponseOutput<PageOutput<IdentityUserJoinedTrialView>>> GetUserJoinedTrialList(IdentityUserJoinedTrialQuery inQuery)
         {
+
+            var defalutSortArray = new string[] { nameof(IdentityUserJoinedTrialView.TrialCreateTime) + " desc" };
+
             var list = await _trialIdentityUserRepository.Where(t => t.IdentityUserId == inQuery.IdentityUserId && t.Trial.IsDeleted==false, false, true)
               .WhereIf(!string.IsNullOrEmpty(inQuery.TrialCode), o => o.Trial.TrialCode.Contains(inQuery.TrialCode))
               .WhereIf(!string.IsNullOrEmpty(inQuery.ResearchProgramNo), o => o.Trial.ResearchProgramNo.Contains(inQuery.ResearchProgramNo))
@@ -62,7 +65,7 @@ namespace IRaCIS.Core.Application.Service
                         UpdateTime = t.UpdateTime,
                     }).ToList(),
 
-                }).ToPagedListAsync(inQuery);
+                }).ToPagedListAsync(inQuery, defalutSortArray);
 
             var info = await _identityUserRepository.Where(t => t.Id == inQuery.IdentityUserId).Select(t =>
             new { t.CreateTime, t.UserCeateSource, t.Trial.ResearchProgramNo, t.Trial.ExperimentName, t.Trial.TrialCode }).FirstOrDefaultAsync();