The above models can be used for carrying frames and welding mobile frames. The Plate load-bearing AGV car adopts the load-bearing car body structure, can be placed all kinds of tooling, used to support the workpiece, can replace catenary, car and other equipment; By combining with non-standard customized vehicles, different types of workpieces can be loaded and transported. The goods are loaded on the Plate load-bearing AGV car, which can realize the easy handling of goods. When multiple plate load-bearing AGV unmanned trucks are used together, an assembly line can be formed to replace the assembly line and form a flexible production system.