Portable and automatically spreading-up cover for vehicle

A portable self-retractable car bush device includes a storage case and a bush; the storage case is the rectangle case and one side of the outer surface of the storage case is provided a conjunction which can conjunct the car body, and the storage-case inside center is provided with a rotational reel; the place between the reel and the storage case is provided a rolling mechanism; the bush is the cover which can cover the car body, the inside end of the bush connects the reel and winds on the reel. During the application of the utility model, the storage case combines the back end of the car body, draws out the bush to cover outer of the car body to defend the sunshine and the rain; when storing the bush, tilt the bush from the car, the bush will self-retractably store into the storage case; it will be time-saving and portable.