Tianyou polycrystalline diamond PCD is made of high grade diamond powder as the main raw material, adding binder and sintering under high temperature and high pressure environment. Although the hardness and heat resistance of polycrystalline diamond PCD are slightly poor, its area is larger and its wear resistance is better. Polycrystalline diamond PCD is mainly used in the production of PCD wire drawing die and PCD tool, its service life is dozens of times that of cemented carbide wire drawing die and cemented carbide tool.