Brake disc dust cover

The utility model discloses a brake disc dust cover which comprises a fan-shaped cover body, the cover body is fixedly connected with an axle bottom plate through bolts, installation holes convenient for the bolts to penetrate through are formed in the two sides of the lower end of the cover body, a plurality of notches are further formed in the cover body, and detachable heat dissipation dust screens are arranged in the notches. The dustproof cover is mounted at the brake disc, the brake disc and the air bag can be blocked, the air bag is prevented from being directly burnt and damaged due to overheat of the brake disc, the service life of the air bag is greatly prolonged, the heat dissipation dustproof net is arranged on the dustproof cover, effective isolation is guaranteed, and meanwhile the service life of the air bag is prolonged. And the heat dissipation effect of the brake disc can be improved, aging damage caused by overheating of the brake disc is avoided, and therefore the overall stability of an a