Abstract: The TiN and AlTiN coatings were prepared on Cr12MoV steel substrate by physical vapor deposition (PVD) method, the morphologies, phase and bonding strength of the coating surface and interface were analyzed by SEM, XRD and scratching tester respectively, and the friction-wear test of the coating was processed. The results show that TiN and AlTiN coatings have higher hardness, the surface roughness of the AlTiN coating is better than that of the TiN coating, the average deviation of the surface profile arithmetic Ra of TiN coating is 328.91nm, while that of AlTiN coating is 112.49nm. Binding strength of TiN coating is 28.8N, and that of AlTiN coating is only 15.05N. Friction coefficient of AlTiN coating slightly higher than that of TiN coating in running-in period and fluctuation period, and friction coefficients of the two coatings are almost same in the stable period, which maintains at about 0.44-0.46. Compared with TiN coating, toughness of AlTiN coating has improved than that of TiN coating, and its wear performance is better than that of TiN coating.