How to prevent and control the quality of the entire vehicle wiring harness pipeline and prevent the overflow of quality problems is of great value and significance to the automobile OEM. Based on the aforementioned analysis, this paper discusses the prevention and control strategy of the whole vehicle wiring harness pipeline quality problems from two aspects. 3.1 Strengthen the whole vehicle pipeline quality review The whole vehicle pipeline quality review must be carried out throughout the whole life cycle of the whole vehicle development, from the preliminary design and development, prototype test production, all the way to the whole vehicle mass production stage. According to the vehicle design and development process, the quality review of the vehicle pipeline can be divided into 2 stages: the preliminary virtual design review and the evaluation of the actual vehicle pipeline. The pipeline quality evaluation follows the following BP (Best Practice) principles: 1) static/dynamic clearance requirements: ① no relative motion pipeline parts, clearance requirements greater than 10 mm; ② complete relative motion pipeline parts require static clearance greater than 25 mm, minimum clearance greater than 10 mm after motion. 2) thermal clearance requirements: ① clearance requirements between heat sensitive parts and heat source system greater than 40 mm; ② heat shield preferably added to the heat source, rather than in the heat-sensitive parts. 3) pipeline risk assessment based on: ① whether there is relative motion, static or dynamic clearance; ② whether the distance between the two fixed points of the long pipeline (hose and hard pipe) is reasonable; ③ whether it is vibration parts; ④ whether the clearance with the sharp edge; ⑤ whether the clearance with the heat source; ⑥ how the tension condition of the pipeline; ⑦ the environment around the pipeline Whether the environmental factors around the pipeline are particularly bad. Preliminary virtual design review stage. This stage mainly simulates the whole vehicle through UG and CAE software, analyzes the gap, motion, stress, fatigue, durability and other dynamic and static characteristics of the whole vehicle pipeline system under various working conditions, conducts virtual evaluation, and finds the best design state. The LL (Lessons Learned) experience of the previous design and development of the same platform models can be learned from each other. Real vehicle pipeline quality evaluation stage. Starting from the prototype production, we formally enter the real vehicle pipeline quality evaluation stage. The quality assessment of the actual pipeline is divided into two levels: the first level is the primary evaluation of the actual pipeline for the factory test vehicles, which mainly detects whether the state of the actual pipeline meets the expected design BP requirements, and eliminates potential quality risks by improving the design for those that cannot meet the expected design requirements; the second level is the DRBTR (Design and ReviewBased on Test Results) for the endurance road test vehicles. ReviewBased on Test Results) for the whole vehicle, analyze and evaluate the pipeline quality problems exposed by the endurance road test, optimize and improve, and eliminate the potential risks. According to the vehicle development plan, the pipeline quality review team conducts pipeline quality review of the vehicle at key time points, evaluates potential engineering design problems, finds pipeline problems caused by component quality and manufacturing, evaluates the impact of component and manufacturing deviations on pipeline quality, and ensures that all pipelines of the vehicle meet the design, functional, manufacturing and after-sales requirements. 3.2 Strengthen the supervision and control of supplier wiring harness component quality and The supervision and control of the quality of the whole vehicle assembly strengthen the supervision and control of the quality of the wire harness parts of suppliers. For the wiring harness assembly parts produced by external suppliers, set up supplier quality management engineers for special tracking and control, and conduct 100% inspection of the wiring harness to strictly control the quality of the parts and eliminate the risk of the quality of the parts inducing the quality problems of the whole vehicle pipeline. For the assembly of wiring harness on the whole vehicle, we formulate reasonable assembly process, strengthen the operation guidance and training for the operators, improve the proficiency of the staff, avoid mis-assembly and omission, ensure the correct and reasonable arrangement of wiring harness on the whole vehicle, and eliminate the potential pipeline quality risks caused by the assembly.