diff --git a/rust/rust.md b/rust/rust.md
index ddd742b..6d02ea0 100644
--- a/rust/rust.md
+++ b/rust/rust.md
@@ -22,3 +22,16 @@ cargo +nightly install cargo-expand
 
 ```
 
+## cargo target
+
+cargo 编译保存地址，不保存到当前目录下，多个cargo包可以共用缓存
+
+```bash
+
+mkdir -p ~/.cache/cargo/
+export CARGO_TARGET_DIR="$HOME/.cache/cargo"
+
+# or 
+echo "[build]" > .cargo/config
+echo "target-dir = \"$HOME/shared_rust_target\"" >> .cargo/config
+```