Laser remelting can eliminate the pores and cracks in the coating,realize the transition from mechanical bonding to atomic diffusion between the substrate and the coating,strengthen the internal binding force of the coating,reduce the grain size,increase the number of grain boundaries and improve the plastic deformation capacity of the coating.So,the ordinary metal substrate could obtained excellent surface properties,and the service life of part can been improved.In the paper the laser remelting spray coating is studied from aspects of remelting parameters,finite element simulation and practical application,and the future development direction of it is looked forward.