For the signed contract, the engineering design department is responsible for the engineering design of the product, and the entire project adopts a three-level guarantee system of design, verification and audit. Clear responsibilities at all levels to ensure the accuracy of product engineering design. In order to mobilize the enthusiasm of the designers, the method of double assessment of workload and quality of work is adopted. The workload is assessed by the design department itself. The quality of work is assessed by the production department and the quality supervision department according to the A, B and C assessment methods. Monthlyly published in the quality monthly report, for the small size of the design quality responsibility, take the compensation system, who caused the quality accident who compensates.