Aiming at the reusability and practicability of China's important product traceability system, this study analyses the root causes of the problems of current traceability system model construction, traceability coding, and traceability basis. To improve the integrity of traceability information, the adaptability of traceability system and the consistency between system, and business, the traceability process model, traceability coding method, traceability domain model, and traceability data integration method are studied. This model has been applied in the planning and design of several important product traceability system construction demonstration projects. The results show that the model has obvious advantages in reusability and practicability.