diff --git a/app/src/main/assets/updateLog.md b/app/src/main/assets/updateLog.md
index 61951bac2..23f1177ef 100644
--- a/app/src/main/assets/updateLog.md
+++ b/app/src/main/assets/updateLog.md
@@ -6,10 +6,7 @@
 **2020/12/12**
 * 修复bug
 * 网络访问框架修改为RxHttp, 有bug及时反馈
-
-**2020/12/11**
-* 修复bug
-* 网络访问框架修改为RxHttp, 有bug及时反馈
+* 优化进度同步
 
 **2020/12/11**
 * 修复因修改进度同步导致的bug
diff --git a/app/src/main/java/io/legado/app/service/help/ReadBook.kt b/app/src/main/java/io/legado/app/service/help/ReadBook.kt
index 5bbfbd7e6..4724dce6c 100644
--- a/app/src/main/java/io/legado/app/service/help/ReadBook.kt
+++ b/app/src/main/java/io/legado/app/service/help/ReadBook.kt
@@ -4,10 +4,7 @@ import androidx.lifecycle.MutableLiveData
 import com.hankcs.hanlp.HanLP
 import io.legado.app.App
 import io.legado.app.constant.BookType
-import io.legado.app.data.entities.Book
-import io.legado.app.data.entities.BookChapter
-import io.legado.app.data.entities.BookSource
-import io.legado.app.data.entities.ReadRecord
+import io.legado.app.data.entities.*
 import io.legado.app.help.*
 import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.model.webBook.WebBook
@@ -78,6 +75,13 @@ object ReadBook {
         }
     }
 
+    fun upProgress(progress: BookProgress) {
+        durChapterIndex = progress.durChapterIndex
+        durChapterPos = progress.durChapterPos
+        clearTextChapter()
+        loadContent(resetPageOffset = true)
+    }
+
     fun clearTextChapter() {
         prevTextChapter = null
         curTextChapter = null
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 1e3a7b935..39a001395 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
@@ -20,6 +20,7 @@ import io.legado.app.constant.PreferKey
 import io.legado.app.constant.Status
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
+import io.legado.app.data.entities.BookProgress
 import io.legado.app.help.ReadBookConfig
 import io.legado.app.help.ReadTipConfig
 import io.legado.app.help.storage.Backup
@@ -108,6 +109,9 @@ class ReadBookActivity : ReadBookBaseActivity(),
             upMenu()
             upView()
         }
+        viewModel.processLiveData.observe(this) {
+            sureSyncProgress(it)
+        }
         viewModel.initData(intent)
     }
 
@@ -218,10 +222,7 @@ class ReadBookActivity : ReadBookBaseActivity(),
                 binding.readView.upPageAnim()
             }
             R.id.menu_book_info -> ReadBook.book?.let {
-                startActivity<BookInfoActivity>(
-                    Pair("name", it.name),
-                    Pair("author", it.author)
-                )
+                startActivity<BookInfoActivity>(Pair("name", it.name), Pair("author", it.author))
             }
             R.id.menu_toc_regex -> TocRegexDialog.show(
                 supportFragmentManager,
@@ -730,6 +731,16 @@ class ReadBookActivity : ReadBookBaseActivity(),
         }
     }
 
+    private fun sureSyncProgress(progress: BookProgress) {
+        alert(R.string.get_book_progress) {
+            message = getString(R.string.current_progress_exceeds_cloud)
+            okButton {
+                ReadBook.upProgress(progress)
+            }
+            noButton()
+        }.show()
+    }
+
     override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
         super.onActivityResult(requestCode, resultCode, data)
         if (resultCode == Activity.RESULT_OK) {
diff --git a/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt b/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
index 92c3e2277..494123cd6 100644
--- a/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/book/read/ReadBookViewModel.kt
@@ -2,11 +2,13 @@ package io.legado.app.ui.book.read
 
 import android.app.Application
 import android.content.Intent
+import androidx.lifecycle.MutableLiveData
 import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.base.BaseViewModel
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
+import io.legado.app.data.entities.BookProgress
 import io.legado.app.data.entities.SearchBook
 import io.legado.app.help.AppConfig
 import io.legado.app.help.BookHelp
@@ -22,9 +24,9 @@ import kotlinx.coroutines.Dispatchers.Main
 import kotlinx.coroutines.withContext
 
 class ReadBookViewModel(application: Application) : BaseViewModel(application) {
-
     var isInitFinish = false
     var searchContentQuery = ""
+    val processLiveData = MutableLiveData<BookProgress>()
 
     fun initData(intent: Intent) {
         execute {
@@ -162,13 +164,14 @@ class ReadBookViewModel(application: Application) : BaseViewModel(application) {
 
     fun syncBookProgress(book: Book) {
         execute {
-            BookWebDav.getBookProgress(book)?.let {
-                book.durChapterIndex = it.durChapterIndex
-                book.durChapterPos = it.durChapterPos
-                book.durChapterTime = it.durChapterTime
-                book.durChapterTitle = it.durChapterTitle
-                ReadBook.clearTextChapter()
-                ReadBook.loadContent(resetPageOffset = true)
+            BookWebDav.getBookProgress(book)?.let { progress ->
+                if (progress.durChapterIndex < book.durChapterIndex ||
+                    (progress.durChapterIndex == book.durChapterIndex && progress.durChapterPos < book.durChapterPos)
+                ) {
+                    processLiveData.postValue(progress)
+                } else {
+                    ReadBook.upProgress(progress)
+                }
             }
         }
     }
diff --git a/app/src/main/res/values-zh-rHK/strings.xml b/app/src/main/res/values-zh-rHK/strings.xml
index 87e2e6ac9..32146a70e 100644
--- a/app/src/main/res/values-zh-rHK/strings.xml
+++ b/app/src/main/res/values-zh-rHK/strings.xml
@@ -789,5 +789,6 @@
     <string name="rule_subscription">规则订阅</string>
     <string name="rule_sub_empty_msg">添加大佬们提供的规则导入地址\n添加后点击可导入规则</string>
     <string name="get_book_progress">拉取云端进度</string>
+    <string name="current_progress_exceeds_cloud">当前进度超过云端进度,是否同步?</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 0e73c856f..370eaeb0a 100644
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@@ -790,5 +790,6 @@
     <string name="rule_subscription">规则订阅</string>
     <string name="rule_sub_empty_msg">添加大佬们提供的规则导入地址\n添加后点击可导入规则</string>
     <string name="get_book_progress">拉取云端进度</string>
+    <string name="current_progress_exceeds_cloud">当前进度超过云端进度,是否同步?</string>
 
 </resources>
diff --git a/app/src/main/res/values-zh/strings.xml b/app/src/main/res/values-zh/strings.xml
index 807ebd11e..15c4f5604 100644
--- a/app/src/main/res/values-zh/strings.xml
+++ b/app/src/main/res/values-zh/strings.xml
@@ -793,5 +793,6 @@
     <string name="rule_subscription">规则订阅</string>
     <string name="rule_sub_empty_msg">添加大佬们提供的规则导入地址\n添加后点击可导入规则</string>
     <string name="get_book_progress">拉取云端进度</string>
+    <string name="current_progress_exceeds_cloud">当前进度超过云端进度,是否同步?</string>
 
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 281a0a367..18e1473b0 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -796,5 +796,6 @@
     <string name="rule_subscription">规则订阅</string>
     <string name="rule_sub_empty_msg">添加大佬们提供的规则导入地址\n添加后点击可导入规则</string>
     <string name="get_book_progress">拉取云端进度</string>
+    <string name="current_progress_exceeds_cloud">当前进度超过云端进度,是否同步?</string>
 
 </resources>