According to the feature of the easy wear of agricultural machine tools, use laser remanufacturing method to produce NiCr＋WC coating on the surface of farm tools steel. The microstructure of the coating and the interface between the coating and the substrate was analyzed. The temperature field of the remanufacturing layer and its interface was simulated by Abaqus. The experimental results show that using laser remanufacturing method can successfully prepare a wear-resistant layer with good metallurgical bonding with the substrate. The SEM analysis shows that WC of coating and NiCr alloy form a good composite material, and the grains in the coating are refined. The hard WC particles are evenly distributed on NiCr alloy base material, forming a good bonding interface. The simulation results are consistent with the temperature field distribution of the experimental results.