Ni/WC composite coatings were prepared on A3 steel by laser cladding. The morphology and distribution of WC particles under the different laser power and their influences on the wear resistance properties were studied. The results showed that under the appropriate laser power WC particles partially dissolved, with the epitaxially grown needle like carbide around them. Undissolved WC particles are combined strongly with the coating matrix, which has improved wear resistance when compared with the Ni based alloy coating.