diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -17,4 +17,5 @@
     * class_name: 文章所属类别名称
 4. class_topic_relation_tree.html # 子研究领域类别与主题对应关系（需要本地下载后用浏览器打开查看）
 5. overall_hotness_change_trend.html # 代码克隆领域研究热度随时间变化情况
-6. sub-fields_hotness_change_trend.html # 代码克隆各子研究领域热度随时间变化情况
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+6. sub-fields_hotness_change_trend.html # 代码克隆各子研究领域热度随时间变化情况
+7. author_network.pdf # 代码克隆作者合作关系网络图
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diff --git a/author_network.pdf b/author_network.pdf
new file mode 100644
index 0000000..deea6ee
Binary files /dev/null and b/author_network.pdf differ