diff --git a/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs b/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs
index f78d2a27b..85e3c0a1e 100644
--- a/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs
+++ b/IRaCIS.Core.Application/Service/Reading/ReadingImageTask/ReadingImageTaskService.cs
@@ -1398,7 +1398,7 @@ namespace IRaCIS.Application.Services
 
 
         /// <summary>
-        /// 拆分病灶
+        /// 拆分病灶 分裂病灶
         /// </summary>
         /// <returns></returns>
         [HttpPost]
@@ -1444,7 +1444,12 @@ namespace IRaCIS.Application.Services
             });
             await _readingTableAnswerRowInfoRepository.AddAsync(rowAnswer);
             await _readingTableQuestionAnswerRepository.AddRangeAsync(tableAnswers);
-            await _readingTableAnswerRowInfoRepository.SaveChangesAsync();
+            await _readingTableAnswerRowInfoRepository.UpdatePartialFromQueryAsync(x => x.Id == inDto.RowId, x => new ReadingTableAnswerRowInfo()
+            {
+                SplitOrMergeType = SplitOrMergeType.SplitMain
+            });
+
+			await _readingTableAnswerRowInfoRepository.SaveChangesAsync();
 
         }
 
diff --git a/IRaCIS.Core.Domain.Share/Reading/ReadEnum.cs b/IRaCIS.Core.Domain.Share/Reading/ReadEnum.cs
index fd28b89c1..d492b9a32 100644
--- a/IRaCIS.Core.Domain.Share/Reading/ReadEnum.cs
+++ b/IRaCIS.Core.Domain.Share/Reading/ReadEnum.cs
@@ -633,27 +633,32 @@ namespace IRaCIS.Core.Domain.Share
     }
 
 
-    /// <summary>
-    /// 病灶分裂或合并
-    /// </summary>
-    public enum SplitOrMergeType
-    {
+	/// <summary>
+	/// 病灶分裂或合并
+	/// </summary>
+	public enum SplitOrMergeType
+	{
+		/// <summary>
+		/// 分裂
+		/// </summary>
+		Split = 0,
 
-        /// <summary>
-        /// 分裂
-        /// </summary>
-        Split = 0,
+		/// <summary>
+		/// 合并
+		/// </summary>
+		Merge = 1,
 
-        /// <summary>
-        /// 合并
-        /// </summary>
-        Merge = 1
-    }
+		/// <summary>
+		/// 分裂主病灶
+		/// </summary>
+		SplitMain = 2,
 
-    /// <summary>
-    /// 是否存在或者NA
-    /// </summary>
-    public enum ExistOrNA
+	}
+
+	/// <summary>
+	/// 是否存在或者NA
+	/// </summary>
+	public enum ExistOrNA
     {
         /// <summary>
         /// NA