Abstract: The present invention discloses a boomerang, which comprises a flight component, a central shaft and a protective device, wherein the flight component comprises at least one rotating device and a driving device; The center of the shaft runs through the center axis of the maximum diameter plane formed when the rotating device rotates, and the protective device is composed of a plurality of ribs connected with each other and arranged around the flight component. The boomerang is safer in use, better in flying performance, more ornamental and playable.