The invention discloses an abrasion compensation device of a driving
disc brake and a self-compensation method of the abrasion compensation device, and belongs to the field of brakes. The compensation device is arranged on a fixing rod and is suitable for adjusting the relative position between a clamp body and a
piston; and the abrasion compensation device comprises a spring pressing plate, a fixing nut, an adjusting expansion sleeve, and adjusting lining, a spring guide sleeve and an elastic piece, wherein the spring pressing plate is installed on the fixing rod in a sliding mode, the fixing nut is installed on the inner wall of the
piston in an interference mode and is suitable for limiting the position of the spring pressing plate, the adjusting expansion sleeve is in
interference fit with the fixing rod, the adjusting lining is arranged on one side of the adjusting expansion sleeve and is in an L shape, the spring guide sleeve is placed on the adjusting expansion sleeve and the adjusting lining, one end of the elastic piece is arranged on the spring guide sleeve, and the other end of the elastic piece is connected with the spring pressing plate. The
piston is pressed back through the elastic piece, it is guaranteed that a friction plate cannot be in dragging abrasion with the
brake disc, and therefore the situation that a
brake sealing failure is caused by continuous
heat generation, and
driving safety is caused is avoided.