diff --git a/binding/nodejs/ReadMe.md b/binding/nodejs/ReadMe.md
index 83d7204..97f97ec 100644
--- a/binding/nodejs/ReadMe.md
+++ b/binding/nodejs/ReadMe.md
@@ -55,7 +55,7 @@ try {
   // 同步读取buffer
   const buffer = Searcher.loadContentFromFile(dbPath)
   // 创建searcher对象
-  const searcher = Searcher.newWithVectorIndex(buffer)
+  const searcher = Searcher.newWithBuffer(buffer)
   // 查询 await 或 promise均可
   const data = await searcher.search('218.4.167.70')
   // data: {region:'中国|0|江苏省|苏州市|电信', ioCount: 0, took: 0.063833}