The CNC cutting machine has the characteristics of fast cutting speed and small slit in the cutting process, which may lead to limited actual cutting speed, excessive kerf and uneven cutting surface, and eliminate the mechanical failure of the plasma CNC cutting machine. Failure to properly set the plasma CNC cutter related parameters during operation will also affect the actual cutting effect. The hub processing parts of large ships are concentrated in the base of high-power diesel engine, frame, cylinder block, cylinder head, piston rod, crosshead, connecting rod, crankshaft, and gearbox drive shaft, rudder shaft and propeller, etc. The material is special alloy steel, which is generally processed in small batches and requires a processing yield of 100%