diff --git a/app/src/main/java/io/legado/app/help/config/ReadBookConfig.kt b/app/src/main/java/io/legado/app/help/config/ReadBookConfig.kt
index 4f25352a8..08f49f028 100644
--- a/app/src/main/java/io/legado/app/help/config/ReadBookConfig.kt
+++ b/app/src/main/java/io/legado/app/help/config/ReadBookConfig.kt
@@ -255,6 +255,12 @@ object ReadBookConfig {
             config.paragraphIndent = value
         }
 
+    var underline: Boolean
+        get() = config.underline
+        set(value) {
+            config.underline = value
+        }
+
     var paddingBottom: Int
         get() = config.paddingBottom
         set(value) {
@@ -448,14 +454,14 @@ object ReadBookConfig {
         var bgAlpha: Int = 100,//背景透明度
         var bgType: Int = 0,//白天背景类型 0:颜色, 1:assets图片, 2其它图片
         var bgTypeNight: Int = 0,//夜间背景类型
-        var bgTypeEInk: Int = 0,
+        var bgTypeEInk: Int = 0,//EInk背景类型
         private var darkStatusIcon: Boolean = true,//白天是否暗色状态栏
         private var darkStatusIconNight: Boolean = false,//晚上是否暗色状态栏
         private var darkStatusIconEInk: Boolean = true,
         private var textColor: String = "#3E3D3B",//白天文字颜色
         private var textColorNight: String = "#ADADAD",//夜间文字颜色
         private var textColorEInk: String = "#000000",
-        private var pageAnim: Int = 0,
+        private var pageAnim: Int = 0,//翻页动画
         private var pageAnimEInk: Int = 3,
         var textFont: String = "",//字体
         var textBold: Int = 0,//是否粗体字 0:正常, 1:粗体, 2:细体
@@ -468,6 +474,7 @@ object ReadBookConfig {
         var titleTopSpacing: Int = 0,
         var titleBottomSpacing: Int = 0,
         var paragraphIndent: String = "　　",//段落缩进
+        var underline: Boolean = false, //下划线
         var paddingBottom: Int = 6,
         var paddingLeft: Int = 16,
         var paddingRight: Int = 16,
diff --git a/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt b/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt
index 740e62955..1745776e6 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/config/BgTextConfigDialog.kt
@@ -112,6 +112,7 @@ class BgTextConfigDialog : BaseDialogFragment(R.layout.dialog_read_bg_text) {
         ivEdit.setColorFilter(secondaryTextColor, PorterDuff.Mode.SRC_IN)
         tvRestore.setTextColor(primaryTextColor)
         swDarkStatusIcon.setTextColor(primaryTextColor)
+        swUnderline.setTextColor(primaryTextColor)
         ivImport.setColorFilter(primaryTextColor, PorterDuff.Mode.SRC_IN)
         ivExport.setColorFilter(primaryTextColor, PorterDuff.Mode.SRC_IN)
         ivDelete.setColorFilter(primaryTextColor, PorterDuff.Mode.SRC_IN)
@@ -138,6 +139,7 @@ class BgTextConfigDialog : BaseDialogFragment(R.layout.dialog_read_bg_text) {
     private fun initData() = with(ReadBookConfig.durConfig) {
         binding.tvName.text = name.ifBlank { "文字" }
         binding.swDarkStatusIcon.isChecked = curStatusIconDark()
+        binding.swUnderline.isChecked = underline
         binding.sbBgAlpha.progress = bgAlpha
     }
 
@@ -174,6 +176,10 @@ class BgTextConfigDialog : BaseDialogFragment(R.layout.dialog_read_bg_text) {
             setCurStatusIconDark(isChecked)
             (activity as? ReadBookActivity)?.upSystemUiVisibility()
         }
+        binding.swUnderline.setOnCheckedChangeListener { _, isChecked ->
+            underline = isChecked
+            postEvent(EventBus.UP_CONFIG, true)
+        }
         binding.tvTextColor.setOnClickListener {
             ColorPickerDialog.newBuilder()
                 .setColor(curTextColor())
diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/ContentTextView.kt b/app/src/main/java/io/legado/app/ui/book/read/page/ContentTextView.kt
index 745eede7a..4dd00ce93 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/ContentTextView.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/ContentTextView.kt
@@ -114,7 +114,7 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
     private fun drawPage(canvas: Canvas) {
         var relativeOffset = relativeOffset(0)
         textPage.lines.forEach { textLine ->
-            draw(canvas, textPage, textLine, relativeOffset)
+            drawLine(canvas, textPage, textLine, relativeOffset)
         }
         if (!callBack.isScroll) return
         //滚动翻页
@@ -122,14 +122,14 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
         val textPage1 = relativePage(1)
         relativeOffset = relativeOffset(1)
         textPage1.lines.forEach { textLine ->
-            draw(canvas, textPage1, textLine, relativeOffset)
+            drawLine(canvas, textPage1, textLine, relativeOffset)
         }
         if (!pageFactory.hasNextPlus()) return
         relativeOffset = relativeOffset(2)
         if (relativeOffset < ChapterProvider.visibleHeight) {
             val textPage2 = relativePage(2)
             textPage2.lines.forEach { textLine ->
-                draw(canvas, textPage2, textLine, relativeOffset)
+                drawLine(canvas, textPage2, textLine, relativeOffset)
             }
         }
     }
@@ -137,7 +137,7 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
     /**
      * 绘制页面
      */
-    private fun draw(
+    private fun drawLine(
         canvas: Canvas,
         textPage: TextPage,
         textLine: TextLine,
@@ -147,6 +147,22 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
         val lineBase = textLine.lineBase + relativeOffset
         val lineBottom = textLine.lineBottom + relativeOffset
         drawChars(canvas, textPage, textLine, lineTop, lineBase, lineBottom)
+        if (ReadBookConfig.underline) {
+            drawUnderline(canvas, textLine, lineBottom)
+        }
+    }
+
+    /**
+     * 绘制下划线
+     */
+    private fun drawUnderline(canvas: Canvas, textLine: TextLine, lineY: Float) {
+        canvas.drawLine(
+            textLine.lineStart,
+            lineY,
+            textLine.lineEnd,
+            lineY,
+            ChapterProvider.contentPaint
+        )
     }
 
     /**
diff --git a/app/src/main/res/layout/dialog_read_bg_text.xml b/app/src/main/res/layout/dialog_read_bg_text.xml
index 54c38f967..d366b9d9d 100644
--- a/app/src/main/res/layout/dialog_read_bg_text.xml
+++ b/app/src/main/res/layout/dialog_read_bg_text.xml
@@ -62,6 +62,14 @@
         android:text="@string/dark_status_icon"
         tools:ignore="TouchTargetSizeCheck" />
 
+    <io.legado.app.lib.theme.view.ThemeSwitch
+        android:id="@+id/sw_underline"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:padding="6dp"
+        android:text="@string/text_underline"
+        tools:ignore="TouchTargetSizeCheck" />
+
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
diff --git a/app/src/main/res/values-es-rES/strings.xml b/app/src/main/res/values-es-rES/strings.xml
index 250ff8e14..4f62d02bc 100644
--- a/app/src/main/res/values-es-rES/strings.xml
+++ b/app/src/main/res/values-es-rES/strings.xml
@@ -1091,4 +1091,5 @@
     <string name="file_manage_summary">管理私有文件夹的文件</string>
     <string name="create_folder">创建文件夹</string>
     <string name="allow_drop_down_refresh">允许下拉刷新</string>
+    <string name="text_underline">文字下划线</string>
 </resources>
diff --git a/app/src/main/res/values-ja-rJP/strings.xml b/app/src/main/res/values-ja-rJP/strings.xml
index 26dd3e79e..3083b0f1c 100644
--- a/app/src/main/res/values-ja-rJP/strings.xml
+++ b/app/src/main/res/values-ja-rJP/strings.xml
@@ -1094,4 +1094,5 @@
     <string name="file_manage_summary">管理私有文件夹的文件</string>
     <string name="create_folder">创建文件夹</string>
     <string name="allow_drop_down_refresh">允许下拉刷新</string>
+    <string name="text_underline">文字下划线</string>
 </resources>
diff --git a/app/src/main/res/values-pt-rBR/strings.xml b/app/src/main/res/values-pt-rBR/strings.xml
index f35a26488..76c6c0211 100644
--- a/app/src/main/res/values-pt-rBR/strings.xml
+++ b/app/src/main/res/values-pt-rBR/strings.xml
@@ -1094,4 +1094,5 @@
     <string name="file_manage_summary">管理私有文件夹的文件</string>
     <string name="create_folder">创建文件夹</string>
     <string name="allow_drop_down_refresh">允许下拉刷新</string>
+    <string name="text_underline">文字下划线</string>
 </resources>
diff --git a/app/src/main/res/values-zh-rHK/strings.xml b/app/src/main/res/values-zh-rHK/strings.xml
index 41f02d108..e0b25b807 100644
--- a/app/src/main/res/values-zh-rHK/strings.xml
+++ b/app/src/main/res/values-zh-rHK/strings.xml
@@ -1091,4 +1091,5 @@
     <string name="file_manage_summary">管理私有文件夹的文件</string>
     <string name="create_folder">创建文件夹</string>
     <string name="allow_drop_down_refresh">允许下拉刷新</string>
+    <string name="text_underline">文字下划线</string>
 </resources>
diff --git a/app/src/main/res/values-zh-rTW/strings.xml b/app/src/main/res/values-zh-rTW/strings.xml
index f7a778205..2e9b75b58 100644
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@@ -1093,4 +1093,5 @@
     <string name="file_manage_summary">管理私有文件夹的文件</string>
     <string name="create_folder">创建文件夹</string>
     <string name="allow_drop_down_refresh">允许下拉刷新</string>
+    <string name="text_underline">文字下划线</string>
 </resources>
diff --git a/app/src/main/res/values-zh/strings.xml b/app/src/main/res/values-zh/strings.xml
index 7159a4b80..38118e3b9 100644
--- a/app/src/main/res/values-zh/strings.xml
+++ b/app/src/main/res/values-zh/strings.xml
@@ -1093,4 +1093,5 @@
     <string name="file_manage_summary">管理私有文件夹的文件</string>
     <string name="create_folder">创建文件夹</string>
     <string name="allow_drop_down_refresh">允许下拉刷新</string>
+    <string name="text_underline">文字下划线</string>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 5a4638ab6..912521f5e 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1094,4 +1094,5 @@
     <string name="file_manage_summary">管理私有文件夹的文件</string>
     <string name="create_folder">创建文件夹</string>
     <string name="allow_drop_down_refresh">允许下拉刷新</string>
+    <string name="text_underline">文字下划线</string>
 </resources>