Diamond tool has a very high hardness and wear resistance, low friction coefficient, high elastic modulus, high heat conductivity, low thermal expansion coefficient, and the advantages of little affinity of non-ferrous metals. Can be used for non-metallic hard brittle materials such as graphite, high wear-resisting material, composite material toughness, high silicon aluminum alloy, and other precision machining of non-ferrous metal materials.Diamond tool type is various, significant performance differences, different types of diamond tool structure, preparation methods and application fields have bigger difference.