As one of the four major processes in the automotive industry, the welding process is self-evident in its importance. It shoulders the important mission of body forming and providing a support frame for the vehicle. In addition to ensuring the appearance and shape, it is also necessary to ensure the accuracy of the installation points of all parts of the assembly. Therefore, its process is far more complex than the other three major processes. The planning and layout of the production line not only needs to be considered in terms of accuracy assurance, production efficiency, distribution logistics, warehousing and storage, but also limited by existing conditions such as plant area and structure, coating corridors, etc.There is no perfect layout plan, only the current suitable layout plan.