the composite layer with tungsten and chromium on the surface of cast steel was achieved.The microstructure, hardness and property to resist impact wear of the composite layer were studied . The results show that at the test condition, the property to resist impact wear is optimum,which is 12.5 times to that of ZG230-450, when the impact energy is less than 2 joules and the content of WC and high carbon chromite is 20% and 40% percent respectively.