diff --git a/libsearch/index/file-content-indexer.cpp b/libsearch/index/file-content-indexer.cpp
index 5112459..59fc146 100644
--- a/libsearch/index/file-content-indexer.cpp
+++ b/libsearch/index/file-content-indexer.cpp
@@ -42,7 +42,7 @@ bool fileContentIndexer::index()
 
     m_document.setData(content);
 
-    std::vector<KeyWord> term = ChineseSegmentation::getInstance()->callSegment(content.left(20480000));
+    std::vector<KeyWord> term = ChineseSegmentation::getInstance()->callSegment(content);
     content.clear();
     content.squeeze();