diff --git a/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt b/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt
index 39cca5312..b0fb383bb 100644
--- a/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/info/BookInfoActivity.kt
@@ -1,11 +1,15 @@
 package io.legado.app.ui.book.info
 
+import android.annotation.SuppressLint
 import android.app.Activity
 import android.content.Intent
 import android.graphics.drawable.Drawable
 import android.os.Bundle
+import android.view.LayoutInflater
 import android.view.Menu
 import android.view.MenuItem
+import android.widget.CheckBox
+import android.widget.LinearLayout
 import androidx.lifecycle.Observer
 import com.bumptech.glide.RequestBuilder
 import com.bumptech.glide.load.resource.drawable.DrawableTransitionOptions
@@ -229,23 +233,27 @@ class BookInfoActivity :
         }
     }
 
+    @SuppressLint("InflateParams")
     private fun deleteBook() {
         viewModel.bookData.value?.let {
             if (it.isLocalBook()) {
                 alert(
                     titleResource = R.string.sure,
-                    messageResource = R.string.sure_delete_book_file
+                    messageResource = R.string.sure_del
                 ) {
-                    positiveButton(R.string.yes) {
-                        viewModel.delBook(true) {
-                            finish()
-                        }
+                    val checkBox = CheckBox(this@BookInfoActivity).apply {
+                        setText(R.string.delete_book_file)
                     }
-                    negativeButton(R.string.no) {
-                        viewModel.delBook(false) {
+                    val view = LayoutInflater.from(this@BookInfoActivity)
+                        .inflate(R.layout.dialog_linear_layout, null)
+                    (view as LinearLayout).addView(checkBox)
+                    customView = view
+                    positiveButton(R.string.yes) {
+                        viewModel.delBook(checkBox.isChecked) {
                             finish()
                         }
                     }
+                    negativeButton(R.string.no)
                 }.show()
             } else {
                 viewModel.delBook {
diff --git a/app/src/main/java/io/legado/app/utils/ViewExtensions.kt b/app/src/main/java/io/legado/app/utils/ViewExtensions.kt
index f0334504e..e37539851 100644
--- a/app/src/main/java/io/legado/app/utils/ViewExtensions.kt
+++ b/app/src/main/java/io/legado/app/utils/ViewExtensions.kt
@@ -6,6 +6,7 @@ import android.graphics.Canvas
 import android.os.Build
 import android.view.View
 import android.view.View.*
+import android.view.ViewGroup
 import android.view.inputmethod.InputMethodManager
 import android.widget.RadioGroup
 import android.widget.SeekBar
@@ -75,6 +76,13 @@ fun View.screenshot(): Bitmap? {
     }.getOrNull()
 }
 
+fun View.setMargin(left: Int, top: Int, right: Int, bottom: Int) {
+    if (layoutParams is ViewGroup.MarginLayoutParams) {
+        (layoutParams as ViewGroup.MarginLayoutParams).setMargins(left, top, right, bottom)
+        requestLayout()
+    }
+}
+
 fun SeekBar.progressAdd(int: Int) {
     progress += int
 }
diff --git a/app/src/main/res/layout/dialog_linear_layout.xml b/app/src/main/res/layout/dialog_linear_layout.xml
new file mode 100644
index 000000000..2f73f4bc3
--- /dev/null
+++ b/app/src/main/res/layout/dialog_linear_layout.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:paddingLeft="16dp"
+    android:paddingRight="16dp">
+
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 84e6e6bb2..9432842a2 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -630,7 +630,7 @@
     <string name="plus">加</string>
     <string name="other_aloud_setting">其它朗读设置</string>
     <string name="system_typeface">系统内置字体样式</string>
-    <string name="sure_delete_book_file">是否删除源文件</string>
+    <string name="delete_book_file">删除源文件</string>
     <string name="default1">预设一</string>
     <string name="default2">预设二</string>
     <string name="default3">预设三</string>