Wedge block type brake for vehicle

Provided is a wedge block type brake for a vehicle. The brake comprises a backing plate, braking shoes, a wedge block type gap automatic adjusting mechanism and a force applying device; the braking shoes are connected to the backing plate via location support shafts and are capable of rotating around the support shaft; friction plates equal or unequal in thickness are riveted on the outer surface of each of the braking shoes; the wedge block type gap automatic adjusting mechanism is arranged between the two braking shoes and is fixed on the backing plate via a connection bolt; and the force applying device is fixed on the wedge block type gap automatic adjusting mechanism via a T-type support. According to the utility model, via the wedge block type gap automatic adjusting mechanism, thrust of the force applying device is imposed on the braking shoes so that braking is performed for the vehicle; reaction speed of braking is fast, braking efficiency is high, and the wedge block type gap automatic adjusting mec