Air pressure disc brake

The invention discloses an air pressure disc brake, which relates to the technical field of automobile braking and comprises a brake disc, a brake caliper, a friction plate, a push disc, a bracket, a push disc fixing hole and the like. The brake disc is reasonable and simple in structure, low in production cost, convenient to install, complete in function, capable of shortening a brake force arm of the brake disc, closer to the center of the brake disc and away from the outer edge of the brake disc, large in brake included angle, stable in brake, capable of preventing the brake disc from shaking, capable of prolonging the service life of a brake friction plate and more suitable for braking of heavy trucks and trailers. By means of the specific position of the push disc and the actual structure of the product, it can be guaranteed that stress of the friction plate is balanced, the working face abrasion degree is the same, the problem that an existing product cannot meet the severe working condition application