Abstract: A new completeness checking technique based on PMI domain knowledge map was proposed for solving the problems of non-uniform form of PMI annotation of product MBD 3D model, error-prone annotation, and difficulty of manual checking. The technique uses a top-down approach to construct the PMI domain knowledge map, constructs the rules for completeness checking by using SWRL rules, checks the redundancy relationship of annotation, substitution relationship of annotation, and contradiction of annotation in three aspects, and realizes knowledge reasoning by combining with Java Web technology. Finally, the feasibility of the method was verified by taking the frame of a marine diesel engine as the object. The technique greatly shortens the checking time and reduces design error rate, and improves the design efficiency of the staff.