The lifting mechanism includes an air motor, planetary reducer, hoist assembly, brake, lifting chain, hook assembly, and main control valve. The lifting mechanism achieves the lifting and lowering of heavy loads by controlling the main control valve, and ensures the safety of the lifting operation through the positioning and braking of the lifting and lowering by opening and closing the brakes. The overall lifting mechanism of the air hoist can be fixed for use or placed beneath the traveling mechanism for mobility. The traveling mechanism employs an air-driven trolley, consisting of an active wheel, a passive wheel, and a wall panel. It is controlled by the main control valve to drive the active wheel with the air motor and planetary reducer, thereby enabling the horizontal movement of the lifted heavy loads. The pneumatic system utilizes compressed air as the power source to control the lifting and movement of the hoist through the air circuit.