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介绍了基于约束的零件形位信息描述方法；提出了基于约束的ＣＡＤ数据模型，阐述了基于约束的多视图参数化设计的概念；详细介绍了参数化设计算法的原理及实现过程；对所提出的参数化设计算法进行了评价．
This paper introduces the description method of the shape information based on the constraint parts, proposes the constraint-based CAD data model, expounds the concept of constraint-based multi-view parametric design, introduces the principle and implementation process of parametric design algorithm in detail, The parametric design algorithm was evaluated.