diff --git a/app/src/main/java/io/legado/app/ui/main/MainViewModel.kt b/app/src/main/java/io/legado/app/ui/main/MainViewModel.kt
index 992ed6a16..ca5c2f2f9 100644
--- a/app/src/main/java/io/legado/app/ui/main/MainViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/main/MainViewModel.kt
@@ -7,6 +7,7 @@ import io.legado.app.constant.BookType
 import io.legado.app.constant.Bus
 import io.legado.app.help.storage.Restore
 import io.legado.app.model.WebBook
+import io.legado.app.utils.LogUtils
 import io.legado.app.utils.postEvent
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.delay
@@ -25,25 +26,29 @@ class MainViewModel(application: Application) : BaseViewModel(application) {
         execute {
             App.db.bookDao().allBooks.forEach { book ->
                 if (book.origin != BookType.local) {
-                    App.db.bookSourceDao().getBookSource(book.origin)?.let { bookSource ->
-                        synchronized(this) {
-                            updateList.add(book.bookUrl)
-                            postEvent(Bus.UP_BOOK, book.bookUrl)
-                        }
-                        WebBook(bookSource).getChapterList(book)
-                            .onSuccess(IO) {
-                                it?.let {
-                                    App.db.bookDao().update(book)
-                                    App.db.bookChapterDao().delByBook(book.bookUrl)
-                                    App.db.bookChapterDao().insert(*it.toTypedArray())
-                                }
+                    if (!updateList.contains(book.bookUrl)) {
+                        App.db.bookSourceDao().getBookSource(book.origin)?.let { bookSource ->
+                            synchronized(this) {
+                                updateList.add(book.bookUrl)
+                                LogUtils.d("updateAdd", book.name)
+                                postEvent(Bus.UP_BOOK, book.bookUrl)
                             }
-                            .onFinally {
-                                synchronized(this) {
-                                    updateList.remove(book.bookUrl)
-                                    postEvent(Bus.UP_BOOK, book.bookUrl)
+                            WebBook(bookSource).getChapterList(book)
+                                .onSuccess(IO) {
+                                    it?.let {
+                                        App.db.bookDao().update(book)
+                                        App.db.bookChapterDao().delByBook(book.bookUrl)
+                                        App.db.bookChapterDao().insert(*it.toTypedArray())
+                                    }
                                 }
-                            }
+                                .onFinally {
+                                    synchronized(this) {
+                                        updateList.remove(book.bookUrl)
+                                        LogUtils.d("updateRemove", book.name)
+                                        postEvent(Bus.UP_BOOK, book.bookUrl)
+                                    }
+                                }
+                        }
                     }
                 }
                 delay(50)