diff --git a/IRaCIS.Core.Application/Service/TrialSiteUser/DTO/TrialSiteViewModel.cs b/IRaCIS.Core.Application/Service/TrialSiteUser/DTO/TrialSiteViewModel.cs
index e09765994..240586d0b 100644
--- a/IRaCIS.Core.Application/Service/TrialSiteUser/DTO/TrialSiteViewModel.cs
+++ b/IRaCIS.Core.Application/Service/TrialSiteUser/DTO/TrialSiteViewModel.cs
@@ -139,5 +139,16 @@ namespace IRaCIS.Core.Application.Contracts.DTO
     }
 
 
+    public class TrialSelectUserBasicInfo
+    {
+        public Guid UserRoleId { get; set; }
 
+        public string FullName { get; set; }
+
+        public string UserName { get; set; }
+
+        public string Email { get; set; }
+
+        public string Phone { get; set; }
+    }
 }
\ No newline at end of file
diff --git a/IRaCIS.Core.Application/Service/TrialSiteUser/TrialMaintenanceService.cs b/IRaCIS.Core.Application/Service/TrialSiteUser/TrialMaintenanceService.cs
index 178493ee8..ff815ec90 100644
--- a/IRaCIS.Core.Application/Service/TrialSiteUser/TrialMaintenanceService.cs
+++ b/IRaCIS.Core.Application/Service/TrialSiteUser/TrialMaintenanceService.cs
@@ -56,8 +56,8 @@ namespace IRaCIS.Core.Application.Service
                         IsDeleted = t.IsDeleted,
                         UserTypeId = t.UserRole.UserTypeRole.Id,
                         UserTypeShortName = t.UserRole.UserTypeRole.UserTypeShortName,
-                        CreateTime=t.CreateTime,
-                        UpdateTime=t.UpdateTime,
+                        CreateTime = t.CreateTime,
+                        UpdateTime = t.UpdateTime,
                     }).ToList(),
 
                 }).ToPagedListAsync(inQuery);
@@ -315,7 +315,23 @@ namespace IRaCIS.Core.Application.Service
         }
 
 
+        public async Task<List<TrialSelectUserBasicInfo>> GetTrialUserRoleList(Guid trialId, UserTypeEnum? userTypeEnum)
+        {
+            var list = await _trialIdentityUserRepository.Where(t => t.TrialId == trialId)
+                    .SelectMany(t => t.TrialUserRoleList)
+                   .WhereIf(userTypeEnum != null, t => t.UserRole.UserTypeEnum == userTypeEnum)
+                   .Select(t => new TrialSelectUserBasicInfo()
+                   {
+                       FullName = t.TrialUser.IdentityUser.FullName,
+                       UserRoleId = t.UserRole.Id,
+                       UserName = t.TrialUser.IdentityUser.UserName,
+                       Phone = t.TrialUser.IdentityUser.Phone,
+                       Email = t.TrialUser.IdentityUser.EMail
+                   })
+                   .ToListAsync();
 
+            return list;
+        }
 
     }
 }