二维零件图特征识别是一个集经验、知识和抽象思维于一体的活动 ,正适合用人工智能、专家系统来解决这类问题。本文给出了一种基于规则的专家系统进行二维零件图特征识别的总体结构框架 ,阐述了基于规则的特征识别专家系统进行特征识别的算法和步骤 ,最后 ,讨论了该系统的实现策略和进一步完善的方法 Two-dimensional part feature recognition is a set of experience, knowledge and abstract thinking in one of the activities, is suitable to use artificial intelligence, expert systems to solve such problems. In this paper, we present a general framework of 2D feature chart recognition based on rule-based expert system, and describe the algorithm and steps for feature recognition based on rule-based feature recognition expert system. Finally, the paper discusses the implementation strategy of the system, Further improve the method