Using coaxial powder feeding method,the Ni / WC ceramic composite coating was cladded on the surface of high manganese steel by YLS-4000 multimode fiber laser with different powers.The microstructure and microhardness of the coating were analyzed by optical microscope and microhardness tester.The room temperature dry friction and wear tests were done and the wear resistance of the coating was analyzed.The results show that the microstructure of the Ni / WC layer mainly consisted of fine cellular crystals,dendrites,columnar dendrites and planar crystals.The average microhardnesses of the Ni / WC layer under the laser powers of 1600 W,1900 W and 2200 W were 980.7 HV0.1,901.0 HV0.1,809.4 HV0.1,respectively,and they are 2.8,2.5,2.3 times of the matrix average microhardness.Under the same friction and wear test conditions,the wear amount of the matrix is 10.4 times that of the cladding layer with the laser power of 1600 W.When the laser power is 1600 W,a coating with dense and uniform microstructure,high hardness and good wear resistance is obtained by laser cladding.