diff --git a/src/forge/Merge/merge.css b/src/forge/Merge/merge.css
index d467300a2..a468635eb 100644
--- a/src/forge/Merge/merge.css
+++ b/src/forge/Merge/merge.css
@@ -198,6 +198,12 @@ form .ant-cascader-picker, form .ant-select {
 .linesContent .lines > span:first-child{
   margin-right: 0px;
 }
+.linesContent .lines,.linesContent .linetype,.no-select,.filesInfo{
+  -webkit-user-select: none; /* Safari */
+  -moz-user-select: none;    /* Firefox */
+  -ms-user-select: none;     /* IE/Edge */
+  user-select: none;         /* 标准语法 */
+}
 .linesContent .lines > span{
   width: 50%;
   text-align: right;