CNC lathes are one of the widespread CNC machine tools. It is mainly used for cutting and processing of internal and external cylinders of shaft parts or disc parts, inner and outer cone surface of any cone angle, cutting inner and outer curved surfaces and cylinders, cone threads, etc. Pole and holes. CNC machine tools are automatically processed by processed parts in accordance with the processing procedures that have been prepared in advance. We write the processing process of parts, process parameters, knife's motion, displacement, cutting parameters, and auxiliary functions, and write in accordance with the instruction code and program format specified in the CNC machine tools as the processing program sheet, and then record the content records in this program list In the control medium, then enter the CNC device of CNC machine tools to command the machine tool processing parts.