Vehicle brake drum

The utility model discloses a vehicle brake drum which comprises a brake drum body, the outer surface of the brake drum body is provided with a first heat dissipation groove, the inner side wall of the first heat dissipation groove is fixedly connected with a heat dissipation ring, and the outer surface of the heat dissipation ring is provided with annularly arranged exhaust ports. The first heat dissipation grooves, the heat dissipation rings and the annularly-arranged exhaust ports are matched with one another, the heat dissipation effect is achieved, the second heat dissipation grooves are matched with the heat dissipation rods, the purpose of accelerating heat dissipation is achieved, the heat dissipation effect of the brake drum body is improved, the weight reducing holes are formed in the outer surface, and the service life of the brake drum body is prolonged. On the basis that the weight of the brake drum body is reduced conveniently, the brake drum is lightened, air can be driven to cool the brake dru