The packaging process is the last process of wire harness production and manufacturing. It mainly includes operations such as coiling, bundling, bagging, and boxing. It is also a process with fewer quality errors. Boxes, less packing, and the possibility of mislabeling the outer box. You can use the MES system to do the electronic packaging program, and use the code scanning gun to scan the codes of the finished wire harness one by one. When the number of scanned codes meets the whole box, a sound alarm will be issued, and the printer will automatically print a label on the outer box, and then directly seal the box. The external qualified label can effectively avoid packing errors. Whether it is the application of error-proofing technology from the design stage of automotive wiring harness products, or the error-proofing design of process and tooling in the manufacturing process of automotive wiring harnesses, it is a job that automotive wiring harness engineers must pay attention to. The application of error-proof design can greatly reduce the rework and repair caused in the manufacturing process, reduce manufacturing costs, improve labor efficiency, and is an effective measure and important means to ensure the quality of wire harnesses.