Abstract: The effect of different cryogenic treatment processes on the wear resistance of YG20 cemented carbide was studied.At the same time, the wear morphology and microstructure were analyzed.The results show that, the abrasion resistance of YG20 cemented carbide can be improved by cryogenic treatment.The lower the temperature of cryogenic treatment, the better the effect of improving wear resistance.Cryogenic treatment enhances the bonding force between bonded Co and cemented WC and effectively reduces the surface damage of YG20 cemented carbides.Cryogenic treatment promotes the formation of dense fish scales on the surface of WC particles.