Automotive wiring harnesses integrate various technologies, such as electrical principle design technology, component design selection technology, wiring harness safety protection technology, automatic electrical signal distribution technology, etc. Therefore, it is an extremely complex design process, with many electrical equipment and interlaced lines. If the design is not considered carefully, many problems such as interference, mismatching size, and circuit failure will occur in the actual installation. These problems are in the second Therefore, it is extremely important to establish a three-dimensional model of the automobile wiring harness in the early development process.