Laser direct deposition remanufacturing technology has the advantages of high energy density, controllable thickness of forming layer and good bonding performance, so it has become one of the effective ways of remanufacturing, but there are some problems in the forming process, such as spheroidizing effect, powder adhesion and pore defects, at the same time, subsequent processing is needed to meet the assembly requirements. Laser polishing has the characteristics of non-contact, green environmental protection and no material loss in the machining process, so it is one of the effective methods to improve the surface quality of adding materials. Based on this, the key processes of laser adding and polishing collaborative remanufacturing are studied for the damage of thin-walled parts, and the effects of optical increasing manufacturing and laser polishing process parameters on the microstructure and properties of remanufacturing are explored. The primary and secondary order of the influence of laser augmentation process parameters on dilution rate is powder feeding rate, laser power and scanning speed, and the factor that has the greatest influence on microhardness is laser power. In the optimization of laser polishing process, the effects of laser energy density and laser polishing scanning spacing on the microstructure and properties of laser reinforcements-polishing collaborative remanufacturing samples were studied, and the optimal parameter combination of collaborative remanufacturing was obtained. Compared to unpolished samples, optimized collaborative remanufacturing resulted in finer cellular and equiaxed crystal structures, with surface roughness reduced by 93%, porosity decreased by 62%, and microhardness increased by over 20%. The friction and wear properties have also been improved.