Experiment of repairing aluminum (Al) alloy 7050 (Al 7050) by laser-cladding techniques was investigated. A 5 kW CO2 laser was used as the heat source. Experiemnts of single trace cladding, multi-trace overlapping cladding, and multi-layer cladding were performed on the Al 7050 plates shielded in a closed box with inert gas. A set of optimized laser-cladding repairation parameters for damaging Al 7050 samples were found, and the microstructures in different cladding regions and micro-appearances of fracture surface were studied. The optimized laser-cladding repairation parameters were laser power of 1.84×104～2.12×104 W/cm2, scanning speed of 5 mm/s, powder feeding rate of 1.8～2.4 g/min, and overlapping width of 1.5 mm. With the optimized repairing parameters, the cladding zone displayed a superior metallurgical bonding with its substrate, the repaired sample surface appeared smooth without any substrate distortion, and the defect formation in the cladding zone was effectively prevented by strengthening shielding of the molten pool with dry argon.