CNC machining is widely used in the field of production machinery, providing enterprises with more efficient processing efficiency, and CNC machining technology breaks through the original production process of low efficiency, long cycle bottleneck. With the support of data operation and computer software and other technologies, mold manufacturing has realized automated production and high precision. For example, in large-scale mold processing, there are many parts with large sizes and complex shapes. The deformation of these parts after heat treatment is large and the grinding process is difficult, so the ceramic turning tool can be used to turn the hardened parts on the CNC machine tool to improve the processing efficiency. There are many kinds of CNC machine tools in the process of mold processing, according to the actual production needs of the type of mold to choose the machine tool, reduce production costs, and fully classify the processing mold. Because the lathe numerical control device has the function of linear and circular interpolation, when it is difficult to control the size and contour shape of particularly complex or rotating parts processing, a reasonable classification basis, the use of digital control technology, to obtain a good mold production effect. Play the lathe numerical control device has some non-circular curve interpolation function, for cylindrical, cone, table, ball and other parts with high precision requirements (mainly refers to the shape, position, size and surface accuracy requirements), the use of turning technology, processing a variety of surface parts with high surface accuracy requirements, including CNC EDM and CNC display processing.