Aluminum is the most widely used in industry for a class of non-ferrous structural materials, in aviation, aerospace, automotive, machinery, ships and chemical industry has a large number of applications. As science and technology and industrial economy in recent years, the rapid development of aluminum alloy welded structure of growing demand, so that the welding of aluminum along with in-depth research. Promote the extensive use of aluminum alloy welding technology, welding technology and also expand the application fields of aluminum, so aluminum welding technology is becoming one of the hot.