Laser technology is currently following the electronics, computers, semiconductors after a major invention, not only excellent performance, but also a wide range of applications, whether it is now in the civilian field, or industrial and military fields, there are now laser applications. It can be said that the current laser application technology is everywhere changing our lives, allowing us to get rid of some traditional processing problems, creating better services and products for us, and injecting new impetus into the current processing applications. With the gradual popularization of laser application technology and the development of related industries, the application space of laser technology has been unprecedentedly increased. It is widely used in the fields of high-tech electronics, automobile manufacturing, precision machining and so on. At the same time, more and more laser technology has been adopted in the traditional processing field. As a direction of laser application, laser welding is a combination of science and technology and traditional technology, but it has different characteristics from traditional processing. Due to the high power density and fast energy release of laser welding, the efficiency of processing is much better than that of traditional methods. At the same time, because the laser is focused, the spot is small, which also makes the adhesion between the two materials better in the welding process, and will not cause damage and deformation of the surface of the material, so after the welding is completed, there is no need to do post-processing on the weld.