Abstract: In order to extend the service life of the mold and improve the surface quality, the laser remelting method with different process parameters was used to treat the supersonic flame sprayed Cr₃C₂-NiCr coating. The OM, SEM, XRD and microhardness tester were used to characterize and test the combination of the remelted Cr₃C₂-NiCr coating and the substrate,the microstructure, the phase structure and the hardness. The results show that the spot size is 4 mm, the scanning speed is 300mm/s, the overlap rate is 60%, and the remelted coating is better bonded to the substrate and the structure is denser under the power of 300 W. The maximum hardness is 1200 HV0.3. After laser remelting, the hardness of the coating surface increases with the increase of power, and the hardness first increases and then decreases. This is due to the laser melting of the coating again, rapid cooling and solidification, and the improvement of quality and performance of the coating.