PCD tools have the advantages of high hardness and wear resistance, low friction coefficient, high elastic modulus, high thermal conductivity, low thermal expansion coefficient, and low affinity with non-ferrous metals. It can be used for precision machining of non-metallic hard and brittle materials such as graphite, high wear-resistant materials, composites, high silicon aluminum alloys and other ductile non-ferrous metal materials. There are many types of diamond tools with significant performance differences. The structure, preparation methods and application fields of different types of PCD tools are quite different.