In addition to the performance and comfort of the car itself, the sales level of a car is whether the car body design attracts consumers’ attention. In the process of car body design and production technology manufacturing, laser welding is currently one of the important process methods in automobile manufacturing. Through laser welding, the accuracy of the combination is further improved, the hidden dangers in the car are reduced, and the safety and comfort are improved. The car’s outer shell greatly increases the rigidity and strength, and can also reduce the noise when prompting the safety of the car.