The article centers around aluminum alloy. It first states its characteristics like lightweight, high strength, corrosion resistance, etc. Then it details common welding methods such as resistance welding, TIG welding, and MIG/MAG welding, along with their features and application scopes. It further analyzes technical challenges in welding including deformation, porosity, oxide film, and joint softening, and proposes corresponding solutions. Overall, it emphasizes the significance of aluminum alloy welding in modern industry, the need to master proper welding techniques, and looks forward to the innovation and progress of aluminum alloy welding technology with the development of science and technology.