Aluminum alloy profiles are used in aviation, aerospace, automotive, machinery manufacturing, shipbuilding, construction, and decoration. It has been widely used in the chemical industry. With the rapid development of science and technology as well as industrial economy in recent years, the demand for aluminum alloy welded structural components has been increasing, which has led to in-depth research on the weldability of aluminum alloys. The widespread application of aluminum alloys has promoted the development of aluminum alloy welding technology, while the development of welding technology has also expanded the application fields of aluminum alloys. Therefore, the welding technology of aluminum alloys is becoming one of the research hotspots