diff --git a/README.md b/README.md
index 1f1436d..1de2a42 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,18 @@ golang environment
 docker pull xiaoqidun/goenv:latest
 ```
 
-## 使用镜像
+## 运行镜像
 ```
 docker run -it --rm xiaoqidun/goenv
 ```
+
+# 交叉编译
+> 以编译android arm64程序为例
+
+```shell
+export CC=aarch64-linux-android21-clang
+export GOOS=android
+export GOARCH=arm64
+export CGO_ENABLED=1
+go build -o main_android_arm64 main.go
+```
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