Several aspects need to be paid attention to in the design of the grounding point of the vehicle wiring harness based on the new automotive electronic and electrical architecture. The grounding point of the vehicle wiring harness should be designed according to the characteristics of the load and whether there are special requirements, and according to the principle of proximity. For electronic control units that have a great impact on vehicle performance and safety, and are easily interfered by other electrical equipment, the grounding points of these electrical equipment need to be set up separately. For the electrical equipment that affects the safety performance of the whole vehicle, its grounding point not only needs to be set up separately, but in order to confirm the safety and reliability, it is best to use a double grounding point.