diff --git a/Tiobon.Core.Services/Ghre/Ghre_ExamRecordServices.cs b/Tiobon.Core.Services/Ghre/Ghre_ExamRecordServices.cs
index 86e900cd..b54802df 100644
--- a/Tiobon.Core.Services/Ghre/Ghre_ExamRecordServices.cs
+++ b/Tiobon.Core.Services/Ghre/Ghre_ExamRecordServices.cs
@@ -633,7 +633,7 @@ public class Ghre_ExamRecordServices : BaseServices<Ghre_ExamRecord, Ghre_ExamRe
         #region 更新实际开始时间
         if (extend.ExamStatus != Consts.DIC_EXAM_RECORD_STATUS.EXAM_END)
         {
-            string sql = $"UPDATE Ghre_ExamRecord SET ActualBeginTime = GETDATE() WHERE Id={examRecordId}";
+            string sql = $"UPDATE Ghre_ExamRecord SET ActualBeginTime = GETDATE(),ActualEndTime = NULL WHERE Id={examRecordId}";
             await Db.Ado.ExecuteCommandAsync(sql);
         }
         #endregion