Processing system of special rim, special rim and processing method thereof

Provided is a processing system of a special rim. The processing system comprises a frame, the frame is provided with a transmission platform used for transmitting the rim, one side of the transmission platform is successively provided with a plurality of rim roll-forming mechanisms from front to back, each rim roll-forming mechanism is provided with a rotating base used for mounting a lower die of a rim roll-forming die and an upper die rotating shaft used for mounting an upper die of the rim roll-forming die, the rotating base is provided with a jacking unit, the jacking unit is laterally provided with a lower die rotating shaft used for mounting a lower die and of the rim roll-forming die, and the lower die rotating shaft is arranged under the upper die rotating shaft; according to theprocessing system of the special rim, multiple processes of rim roll-forming are reasonably integrated on one device, the rim production efficiency is effectively improved, at the same time, the produced rim is provided with