Abstract: Changing the laser scanning speed, Ni-Cr-Cu was fabricated on the surface of Q235 carbon steel by laser additive technology. The microstructure, element composition and hardness of the surfaces were characterized by means of SEM, EDS and vickers indenter. The abrasion and corrosion resistance of surfaces were analyzed by pin on disk tribometer and electrochemical workstation respectively. And antimicrobial properties of surfaces were investigated by self-designed bacteriostasis test.The results show that the microstructure of surfaces is mainly filled with dendritic and cellular crystals.The crystalline grain fullness is deeply affected by the scanning rate.The Chromium-rich phase whose microhardness is up to 1500 HV and black phase with 13.21%Cu are also found in the microstructure of bacteriostasis surfaces. The hardness, wear resistance and corrosion resistance of the surfaces are found to be better than those of the substrate, and the corrosion resistance is greatly improved. Due to the improvement of corrosion resistance, the short-term antibacterial properties of surfaces are affected. And it is found that the comprehensive performance under the laser scanning rate of 700 mm/min is best.