Abstract: Metal Ni60 and WC powder was preset on the surface of substrate 45 steel by preset coating method. Different coating layers were obtained by using different laser process parameters, and the parameters were optimized. The distribution,microstructure and wear characteristics of alloy elements in laser coating were systematically studied by means of optical microscope, scanning electron microscope and friction and wear tester. The results show that, the wear resistance of WC composite coating with volume fraction of 50vol% and particle size of 1 μm by using the optimized process parameters is 7times of that of quenched 45 steel and 5 times of that of Ni60 coating.