<p>In order to investigate the effect of laser remelting on the (Ti, W)C particle-reinforced Ni-based fusion cladding layer and to eliminate the defects such as cracks, porosity, and elemental segregation of the (Ti, W)C/Ni-based composite coatings, the surface was laser remelted. To obtain reasonable remelting parameters, firstly, based on COMSOL, the remelting process was analyzed by finite element simulation of temperature field and stress field, to investigate the influence of laser power and scanning speed on the remelting process temperature and stress, and to realize the preliminary optimization of laser process parameters; Secondly, experimental verification is carried out based on the simulation results to analyze the macro morphology, microstructure and hardness of the coating. The results show that when the laser power is 1200&#xa0;W and the scanning speed is 4&#xa0;mm/s, the metallurgical bonding between the coating and the substrate is good, the residual stress of the coating is minimized. The defects such as porosity and cracks are completely eliminated. The microstructure is denser with no obvious elemental segregation. The experimental and simulation results are consistent, indicating that the simulation model is accurate and reliable.</p>