diff --git a/README.md b/README.md
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+++ b/README.md
@@ -5,6 +5,10 @@
 ## 在线阅读
 [开始阅读](<https://github.com/hellogcc/100-gdb-tips/blob/master/src/index.md>)
 
+## 快速参考
+
+[GDB命令卡片](https://github.com/hellogcc/100-gdb-tips/blob/master/refcard.pdf)
+
 ## 如何参与
 
 直接发PULL REQUEST，或与我们联系。
diff --git a/refcard.pdf b/refcard.pdf
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Binary files /dev/null and b/refcard.pdf differ