The machine tool industry provides production equipment for the equipment manufacturing industry and is the working machine of the equipment manufacturing industry. Its downstream covers traditional machinery industry, automobile industry, power equipment, railway locomotives, ships, national defense industry, aerospace industry, petrochemical industry, engineering machinery, electronic information technology industry and other processing industries. The upstream of the machine tool industry is mainly basic materials and parts, including structural parts, cast iron, steel, CNC system, drive system, transmission system, etc. There are many types of machine tools, and metal cutting machine tools are the most widely used.