Abstract: The wear of roller surface in the rolling process will seriously affect the product quality, and frequent shutdown and roller change will greatly increase the production costs. For the roller surface wear, laser alloying technology is an economical and efficient method to modify the surface of roller. In this paper, application of cobalt, nickel and iron alloy powders in the laser alloying of roller surface is introduced. Through microhardness test and friction wear test, it is proved that the alloying layer greatly improves the hardness and wear resistance of the substrate surface, which can prolong the service life of the roller very well. At the same time, the strengthening effect is related to the alloy powder composition and laser irradiation process parameters, thus the appropriate alloy powder composition and laser processing parameters should be selected according to the actual situation to achieve the best modification effect.