diff --git a/install.sh b/install.sh
index 5db328c..c9f4dee 100755
--- a/install.sh
+++ b/install.sh
@@ -110,6 +110,8 @@ info "文件所有权已设置为 $RUN_USER"
 create_wrapper() {
     local script="$1"  # padsleep.py 或 padsleep_tui.py
     local link="$2"    # /usr/local/bin/padsleep
+    # 先移除旧文件/软链接，避免 cat 跟随链接覆盖源文件
+    rm -f "$link"
     cat > "$link" <<WRAPPER
 #!/bin/bash
 exec "$PYTHON_BIN" "$INSTALL_DIR/$script" "\$@"