diff --git a/app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt b/app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt
index 1db9bbfb1..d36eec510 100644
--- a/app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/source/edit/BookSourceEditActivity.kt
@@ -632,6 +632,8 @@ class BookSourceEditActivity :
             val edit = view.editableText//获取EditText的文字
             if (start < 0 || start >= edit.length) {
                 edit.append(text)
+            } else if (start > end) {
+                edit.replace(end, start, text)
             } else {
                 edit.replace(start, end, text)//光标所在位置插入文字
             }