diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -75,6 +75,10 @@ void hnsw_approximate_knn(HNSWContext *ctx, VecData *q, int *results, int k); //
 
 ## 3. 数据集下载
 
-SIFT 数据集可以在以下网站中下载： http://corpus-texmex.irisa.fr/
+SIFT 数据集下载链接及其详细说明可以在以下网站中找到： http://corpus-texmex.irisa.fr/
+
+SIFT SMALL 数据集下载链接：ftp://ftp.irisa.fr/local/texmex/corpus/siftsmall.tar.gz
+
+SIFT 数据集下载链接：ftp://ftp.irisa.fr/local/texmex/corpus/sift.tar.gz
 
 建议先在 SIFT SMALL 数据集上进行开发和测试，保证算法的正确性后再在规模较大的 SIFT 数据集上进行性能测试和调优。
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