Since aluminum and aluminum alloy having a high thermal conductivity and heat capacity, especially in the large-thickness plate welding of aluminum bus, regardless of arc welding, flame welding, carbon arc welding and TIG welding, or to be locally heated and melted are more difficult to weld, weld quality assurance is not easy. Welded aluminum bus group shown in Figure 1. Expansion in the construction Copper Electrode of a large aluminum company, from the manipulation process, welding quality, safety and environmental protection measures and other aspects of scientific proof, after numerous tests, the successful use of the heat concentrated arc, weld penetration, the mother timber deep penetration and high productivity semi-automatic MIG welding (MIG welding), and achieved good results, for the formation of this construction method. Globular transfer and short delivery.