According to the characteristics of large batches and high degree of automation in the automotive industry, laser welding equipment is developing towards high-power and multi-channel. In terms of technology, Sandia National Laboratory in the United States and Pratt Witney jointly conducted research on the addition of powder metal and metal wires in the laser welding process. The Institute of Applied Beam Technology in Bremen, Germany, conducted extensive research on the use of laser welding for aluminum alloy body frames. It is believed that adding filler metal to the weld seam can help eliminate hot cracks, improve welding speed, and solve tolerance problems, The developed production line has been put into production at the factory.