本文通过对汽车转向助力泵产品结构的分析，对具有不同构造特征的零件，采用与其相适应的建模方法，设计出了一种高效、实用的面向产品的复合建模系统。本文重点介绍了成组技术建模、基于特征的建模、基于实例修演建模三种零件建模技术。 Based on the analysis of the product structure of the steering booster pump, this paper designs a kind of efficient and practical product-oriented composite modeling system for the parts with different structural characteristics by adopting the corresponding modeling method. This article focuses on grouping technology modeling, feature-based modeling, and instance-based performance modeling three part modeling techniques.