It has high cost-performance with low waste and practicality. The double-coordinate CNC system completes the processing of the workpiece inner hole, external circle, mould cavity, curving faces like cylinder automatically according to the operation procedure preliminarily performed. This kind of machine tool is mainly applied to cut heavy disc-type and loop-type machinery parts with relevantly large diameters, and widely used to manufacture the rubber machine, heavy machine, car production, mine machine and parts for rail equipment.