Air pressure disc brake, chassis air brake system and vehicle

The utility model discloses an air pressure disc brake, a chassis air braking system and a vehicle, the pressure disc brake comprises a friction plate and an adjusting mechanism, a rotating shaft is arranged in the adjusting mechanism, the rotating shaft of the adjusting mechanism can compensate the abrasion loss of the friction plate to rotate during service braking, the pressure disc brake further comprises a continuous abrasion sensor and a transmission mechanism, the continuous wear sensor is electrically connected with a display device, and the voltage change of the continuous wear sensor is in proportion to the wear extent of a friction plate of the pneumatic disc brake; and the transmission mechanism connects the gear of the continuous wear sensor with the rotating shaft of the adjusting mechanism to jointly form a consistent rotating structure. According to the utility model, the problem that the friction material of the friction plate is almost remained due to the fact that a car owner cannot find th