Laser, as a great invention of the 20th century, has epoch-making significance in the application of automotive manufacturing. This advanced processing technology has penetrated into all aspects of automotive manufacturing, including welding, cutting, drilling, marking, heat treatment, and forming, and even micro machining of electronic subsystems. Today, let me introduce some representative processing technologies of lasers in automobiles. Laser welding has become one of the important means in automobile manufacturing due to its high energy density, small deformation, narrow heat affected zone, high welding speed, easy implementation of automatic control, and no subsequent processing. The body and chassis of a car have hundreds or thousands of different parts, and how to connect them together has a direct impact on the rigidity of the entire car body. Laser welding can connect almost all metal materials of different thicknesses, grades, types, and grades together, improving production efficiency and quality while also increasing the flexibility of car design and material selection.