支持。To meet the requirements for knowledge in product design process, a product information model based on KBE was presented. Using knowledge representation framework based on KBE, the model was established by object-oriented method and supported mixed knowledge representation. With classification and representation of knowledge based on attribute, constraint and operation, a PIM main framework which described classification and composition mechanism was modeled by UML. Shock absorber expert system was established based on this model to merge engineering knowledge and support information integration of product lifecycle. 