diff --git a/modules/zsh/module.yaml b/modules/zsh/module.yaml
index 12cee84..a7bdbc8 100644
--- a/modules/zsh/module.yaml
+++ b/modules/zsh/module.yaml
@@ -3,3 +3,5 @@ description: Zsh 及插件
 dotfiles:
   - source: dotfiles/.zshrc
     target: ~/.zshrc
+post_install_hook: scripts/set-default-shell.sh
+hook_behavior: once
diff --git a/scripts/set-default-shell.sh b/scripts/set-default-shell.sh
new file mode 100755
index 0000000..412db3d
--- /dev/null
+++ b/scripts/set-default-shell.sh
@@ -0,0 +1,10 @@
+#!/bin/bash
+set -euo pipefail
+
+if [ "$SHELL" != "$(which zsh)" ]; then
+    echo "==> 设置默认 shell 为 zsh..."
+    sudo chsh -s "$(which zsh)" "$USER"
+    echo "✓ 默认 shell 已设置为 zsh（重新登录后生效）"
+else
+    echo "默认 shell 已经是 zsh"
+fi