The tin-nickel-bronze alloy was successfully coated with a fiber-optic red light composite blue light laser, and the effects of different blue light laser powers on the coating densities and mechanical properties were investigated. The microstructure, elemental distribution, micro-hardness, and friction and wear properties of the SnNiBronze coating were analyzed and studied. The results show that with the increase of blue light power, the densities of tin-nickel-bronze alloy coatings increased, and all coatings formed a good metallurgical bond with the substrate. The coatings are composed of uniformly distributed (α δ) and α phases, and the micro-structure is dendritic. The micro-hardness of the coating increases slightly with increasing blue light power, and the average friction and wear coefficient decreases and then increases, and the best friction and wear performance is achieved at 60 W blue light power of the fiber laser composite. The corrosion resistance of the coating improves as the blue laser power increases.