Diamond coated, cubic boron nitride is the use of chemical plating, electroplating and other methods on the surface of diamond, cubic boron nitride coated with a specific thickness of metal layer, in order to improve the binding ability of diamond, cubic boron nitride and binder, enhance the holding power of abrasive, cover up the abrasive itself defects, improve the strength of abrasive particles, thermal stability and chemical corrosion. At the same time, the metal coating can isolate the air, improve the heat dissipation, reduce the oxidation and thermal damage of diamond and cubic boron nitride, greatly extend the service life of the abrasive particles and improve the application performance of diamond tools and CBN tools.