diff --git a/internal/executor/gitclean.go b/internal/executor/gitclean.go
new file mode 100644
index 0000000..d717470
--- /dev/null
+++ b/internal/executor/gitclean.go
@@ -0,0 +1,92 @@
+package executor
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"strings"
+)
+
+// gitCleanOptions are the parsed arguments of `kopsc git clean`.
+type gitCleanOptions struct {
+	DryRun bool
+}
+
+// runGitClean removes untracked files and directories.
+func runGitClean(ctx context.Context, req BuiltinRequest) error {
+	return runGitCleanWith(ctx, req, execGitRunner{})
+}
+
+func runGitCleanWith(ctx context.Context, req BuiltinRequest, runner gitRunner) error {
+	opts, confirmed, err := parseGitCleanArgs(req.Args)
+	if err != nil {
+		return err
+	}
+	confirmed = confirmed || req.Confirmed
+
+	// First, show what will be cleaned (dry-run)
+	dryOut, _, err := runner.Run(ctx, "clean", "-fd", "--dry-run")
+	if err != nil {
+		return fmt.Errorf("检查未跟踪文件失败: %w", err)
+	}
+
+	files := strings.TrimSpace(dryOut)
+	if files == "" {
+		fmt.Fprintf(req.Stdout, "没有未跟踪的文件或目录需要清理\n")
+		return nil
+	}
+
+	// Count files
+	lines := strings.Split(files, "\n")
+	count := 0
+	for _, line := range lines {
+		if strings.HasPrefix(line, "Would remove ") {
+			count++
+		}
+	}
+
+	fmt.Fprintf(req.Stdout, "将清理 %d 个未跟踪的文件/目录:\n\n", count)
+	for _, line := range lines {
+		if strings.HasPrefix(line, "Would remove ") {
+			fmt.Fprintf(req.Stdout, "  %s\n", strings.TrimPrefix(line, "Would remove "))
+		}
+	}
+
+	if opts.DryRun {
+		fmt.Fprintf(req.Stdout, "\n（仅预览，未执行任何操作）\n")
+		return nil
+	}
+
+	if !confirmed {
+		fmt.Fprintf(req.Stdout, "\n加 --yes 确认删除这些文件。\n")
+		return &ExitError{Code: 2, Err: errors.New("需要确认")}
+	}
+
+	// Execute clean
+	if _, stderr, err := runner.Run(ctx, "clean", "-fd"); err != nil {
+		return fmt.Errorf("清理失败: %w\n%s", err, stderr)
+	}
+
+	fmt.Fprintf(req.Stdout, "\n✓ 已清理 %d 个未跟踪的文件/目录\n", count)
+	return nil
+}
+
+func parseGitCleanArgs(args []string) (gitCleanOptions, bool, error) {
+	var opts gitCleanOptions
+	var confirmed bool
+
+	for _, arg := range args {
+		switch arg {
+		case "--yes", "-y":
+			confirmed = true
+		case "--dry-run", "-n":
+			opts.DryRun = true
+		default:
+			if strings.HasPrefix(arg, "-") {
+				return opts, false, fmt.Errorf("未知选项 %q", arg)
+			}
+		}
+	}
+
+	return opts, confirmed, nil
+}