Machine Tool refers to the machine that makes the machine. There are many ways to process mechanical parts in modern machinery manufacturing: in addition to cutting, there are casting, forging, welding, stamping, extrusion, etc., but all parts with high precision requirements and fine surface roughness requirements generally need to be finally processed on the machine tool. In the general machine manufacturing, the processing workload borne by the machine tool accounts for 40%-60% of the total machine manufacturing work, it can be said that the machine tool is the infrastructure of the equipment manufacturing industry, is an important cornerstone of modern industrial development, so it is also called "industrial mother machine". China Machine Tool Industry Association divides machine tools and related tools into metal cutting machine tools, metal forming machine tools, woodworking machine tools, casting machinery and other complete machine equipment fields, as well as tools and measuring instruments, abrasive abrasives, CNC systems and core functional components and other supporting product fields. Among them, metal cutting machine tools are an important part of China's machine tool industry, and its number is the largest and most widely used, so machine tools sometimes refer to metal cutting machine tools in a narrow sense.