diff --git a/IRaCIS.Core.Application/Service/Reading/ClinicalData/ClinicalAnswerService.cs b/IRaCIS.Core.Application/Service/Reading/ClinicalData/ClinicalAnswerService.cs
index 4270ceab9..eb8338e15 100644
--- a/IRaCIS.Core.Application/Service/Reading/ClinicalData/ClinicalAnswerService.cs
+++ b/IRaCIS.Core.Application/Service/Reading/ClinicalData/ClinicalAnswerService.cs
@@ -337,6 +337,15 @@ namespace IRaCIS.Core.Application.Service
               
             }
 
+            if (clinicalForm.CheckDate != null)
+            {
+                if (await _readModuleRepository.AnyAsync(x => x.SubjectVisit.LatestScanDate <= clinicalForm.CheckDate && x.IsCRCConfirm))
+                {
+					throw new BusinessValidationFailedException("无法添加和修改当前日期的临床数据，因为CRC已经确认！");
+				}
+
+			}
+
             List<ClinicalQuestionAnswer> clinicalQuestionAnswers = inDto.QuestionAnswers.Select(x => new ClinicalQuestionAnswer()
             {
                 Answer=x.Answer,
diff --git a/IRaCIS.Core.Domain/Reading/ClinicalQuestionAnswer/ClinicalForm.cs b/IRaCIS.Core.Domain/Reading/ClinicalQuestionAnswer/ClinicalForm.cs
index 71d126eaa..f41eb924f 100644
--- a/IRaCIS.Core.Domain/Reading/ClinicalQuestionAnswer/ClinicalForm.cs
+++ b/IRaCIS.Core.Domain/Reading/ClinicalQuestionAnswer/ClinicalForm.cs
@@ -27,7 +27,7 @@ namespace IRaCIS.Core.Domain.Models
 		/// <summary>
 		/// 检查日期
 		/// </summary>
-		public DateTime CheckDate { get; set; }
+		public DateTime? CheckDate { get; set; }
 	
 		/// <summary>
         /// 创建日期