diff --git a/algorithm/README.md b/algorithm/README.md
index 8c478c2..a151a10 100644
--- a/algorithm/README.md
+++ b/algorithm/README.md
@@ -1,9 +1,13 @@
 # 经典算法总结
 
+经典算法在刷题的时候会经常遇到，因此本节对一些经典算法作简单介绍并给出代码模板，方便刷题参考使用。
+
+不定期更新中, 欢迎关注...
+
 ## 图
 
-* [最小生成树](MST.md)
+* [最小生成树](graph/MST.md)
 
 ## 动态规划
 
-* [背包问题](pack_problem.md)
\ No newline at end of file
+* [背包问题](dynamic_programming/pack_problem.md)
\ No newline at end of file
diff --git a/algorithm/pack_problem.md b/algorithm/dynamic_programming/pack_problem.md
similarity index 100%
rename from algorithm/pack_problem.md
rename to algorithm/dynamic_programming/pack_problem.md
diff --git a/algorithm/MST.md b/algorithm/graph/MST.md
similarity index 100%
rename from algorithm/MST.md
rename to algorithm/graph/MST.md