diff --git a/app/src/main/assets/updateLog.md b/app/src/main/assets/updateLog.md
index e70c4dfd2..8a148229a 100644
--- a/app/src/main/assets/updateLog.md
+++ b/app/src/main/assets/updateLog.md
@@ -11,12 +11,13 @@
 * 正文出现缺字漏字、内容缺失、排版错乱等情况，有可能是净化规则或简繁转换出现问题。
 * 漫画源看书显示乱码，**阅读与其他软件的源并不通用**，请导入阅读的支持的漫画源！
 
-**2022/02/13**
+**2022/02/16**
 
 * 目录正文现在按照搜索发现分别校验
 * 书源校验的超时校验存在bug
 * 标题支持换行
 * 修复校验超时判断
+* 优化txt目录识别,超长章节单独拆分,不在全文拆分
 
 **2022/02/11**
 
diff --git a/app/src/main/java/io/legado/app/model/localBook/TextFile.kt b/app/src/main/java/io/legado/app/model/localBook/TextFile.kt
index f776af9c9..afe3f1b0a 100644
--- a/app/src/main/java/io/legado/app/model/localBook/TextFile.kt
+++ b/app/src/main/java/io/legado/app/model/localBook/TextFile.kt
@@ -118,11 +118,14 @@ class TextFile(private val book: Book) {
             }
             //获取文件中的数据到buffer，直到没有数据为止
             while (
-                fileEnd - curOffset > 0 &&
+                fileEnd - curOffset - bufferStart > 0 &&
                 bis.read(
                     buffer,
                     bufferStart,
-                    min((bufferSize - bufferStart).toLong(), fileEnd - curOffset).toInt()
+                    min(
+                        (bufferSize - bufferStart).toLong(),
+                        fileEnd - curOffset - bufferStart
+                    ).toInt()
                 ).also { length = it } > 0
             ) {
                 var end = bufferStart + length
@@ -258,11 +261,14 @@ class TextFile(private val book: Book) {
             }
             //获取文件中的数据到buffer，直到没有数据为止
             while (
-                fileEnd - curOffset > 0 &&
+                fileEnd - curOffset - bufferStart > 0 &&
                 bis.read(
                     buffer,
                     bufferStart,
-                    min((bufferSize - bufferStart).toLong(), fileEnd - curOffset).toInt()
+                    min(
+                        (bufferSize - bufferStart).toLong(),
+                        fileEnd - curOffset - bufferStart
+                    ).toInt()
                 ).also { length = it } > 0
             ) {
                 blockPos++