Abstract: Based on the hierarchical analysis of auto-panel product features, a comprehensive knowledge model is presented to integrate its configuration, engineering and geometry information together. Using object-oriented representation methodology, geometric features, rules and constraints are described by class with related attributes and methods. EXPRESS language and KBE development language are adopted to delineate geometric layer and knowledge layer of model respectively. Through language binding with object-oriented language C++, these two descriptions are highly integrated to support the whole course of intelligent process planning.