diff --git a/libsearch/index/file-content-indexer.cpp b/libsearch/index/file-content-indexer.cpp
index ee488a4..dc989b5 100644
--- a/libsearch/index/file-content-indexer.cpp
+++ b/libsearch/index/file-content-indexer.cpp
@@ -41,9 +41,7 @@ bool fileContentIndexer::index()
     }
 
     m_document.setData(content);
-    //'\xEF\xBC\x8C' is "，" "\xE3\x80\x82" is "。"  use three " " to replace ,to ensure the offset info.
-    content = content.replace("\t", " ").replace("\xEF\xBC\x8C", "   ").replace("\xE3\x80\x82", "   ");
-    std::vector<KeyWord> term = ChineseSegmentation::getInstance()->callSegment(content.left(20480000).toStdString());
+    std::vector<KeyWord> term = ChineseSegmentation::getInstance()->callSegment(content);
     content.clear();
     content.squeeze();