diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
index 3de4e9447..d06140a86 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookActivity.kt
@@ -430,7 +430,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
     override fun onMenuItemSelected(itemId: Int): Boolean {
         when (itemId) {
             R.id.menu_bookmark -> binding.readView.curPage.let {
-                showBookMark(0, it.selectedText)
+                showBookMark(it.selectStartPos, it.selectedText)
                 return true
             }
             R.id.menu_replace -> {
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 0a6244bb7..847122163 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
@@ -482,12 +482,11 @@ class ContentTextView(context: Context, attrs: AttributeSet?) : View(context, at
 
     val selectStartPos: Int
         get() {
-            for (i in 0 until selectStart[0]) {
-
+            val page = relativePage(selectStart[0])
+            page.getTextChapter()?.let {
+                return it.getReadLength(page.index) +
+                        page.getSelectStartLength(selectStart[1], selectStart[2])
             }
-
-
-
             return 0
         }
 
diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt b/app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt
index e457d5c80..34720e06a 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/PageView.kt
@@ -272,5 +272,7 @@ class PageView(context: Context) : FrameLayout(context) {
 
     val selectedText: String get() = binding.contentTextView.selectedText
 
+    val selectStartPos get() = binding.contentTextView.selectStartPos
+
     val textPage get() = binding.contentTextView.textPage
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/entities/TextLine.kt b/app/src/main/java/io/legado/app/ui/book/read/page/entities/TextLine.kt
index 7610ad9d3..d921a217e 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/entities/TextLine.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/entities/TextLine.kt
@@ -16,6 +16,8 @@ data class TextLine(
     var isReadAloud: Boolean = false
 ) {
 
+    val charSize: Int get() = textChars.size
+
     fun upTopBottom(durY: Float, textPaint: TextPaint) {
         lineTop = ChapterProvider.paddingTop + durY
         lineBottom = lineTop + textPaint.textHeight
diff --git a/app/src/main/java/io/legado/app/ui/book/read/page/entities/TextPage.kt b/app/src/main/java/io/legado/app/ui/book/read/page/entities/TextPage.kt
index afc49711e..e2d291141 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/page/entities/TextPage.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/page/entities/TextPage.kt
@@ -8,6 +8,7 @@ import io.legado.app.help.ReadBookConfig
 import io.legado.app.service.help.ReadBook
 import io.legado.app.ui.book.read.page.provider.ChapterProvider
 import java.text.DecimalFormat
+import kotlin.math.min
 
 @Suppress("unused")
 data class TextPage(
@@ -124,6 +125,15 @@ data class TextPage(
             return percent
         }
 
+    fun getSelectStartLength(lineIndex: Int, charIndex: Int): Int {
+        var length = 0
+        val maxIndex = min(lineIndex, lineSize)
+        for (index in 0 until maxIndex) {
+            length += textLines[index].charSize
+        }
+        return length + charIndex
+    }
+
     fun getTextChapter(): TextChapter? {
         ReadBook.curTextChapter?.let {
             if (it.position == chapterIndex) {