The invention relates to an automatic processing system for automobile transmission shaft parts, which includes a base plate, a mounting column, a cleaning device and a clamping device. There is a cleaning device, and a clamping device is arranged on the outside of the cleaning device. The clamping device is installed on the bottom plate. The clamping device includes a mounting plate, a moving motor, a telescopic connecting frame, a screw, a rotating circular plate, a moving circular plate, a connecting telescopic rod, and a suction cup. , fixed pressure plate, fixed cylinder and fixed plate. The invention can solve the problems of high labor cost, low work efficiency, poor cleaning effect, inconvenient adjustment and small application range existing in the cleaning process of the existing automobile transmission shaft, and can realize the function of automatic cleaning of the automobile transmission shaft, with labor cost Low cost, high work efficiency, good cleaning effect, good adjustability and wide range of use.