PCD has the characteristics of high hardness, wear resistance and good thermal conductivity. It can obtain high machining accuracy and machining efficiency in high-speed cutting. It is mainly used for machining non-ferrous metals and their alloys that are difficult to machine, and non-metallic materials, such as engineering ceramics, stone, wood and carbon fiber materials. At present, it is widely used in automotive engines and their accessories, high-precision medical equipment, precision electronic components, aerospace equipment and other fields.