Laser is a new light source, its coherence, monochromaticity, direct and high output power characteristics, which are unmatched by other light sources. Focusing the laser to a point, the power density on the focal plane can reach 105-1013w/cm2. Laser welding uses the excellent direct high power density of the laser beam to work. The laser is generated by the laser, by Flexible fiber optic light Road transmission, after focusing by the focusing lens in the welding head, it acts on the welding seam between the processed materials, and with the assistance of shielding gas (to prevent the material from being oxidized), the material is liquefied to form a specific molten pool, thereby achieving the purpose of welding.