关键词: 自然语言，几何作图，几何知识库，模式匹配

Abstract: In the case of computer geometry graphic software matures, the challenge of the geometic software is that convert geometry propositions described by natural language to geometric figure. This paper that combined with the needs of geometric natural language and established a set of effective understanding of language model, designed and developed the interface that realized the automatic conversion from natural language to geometric drawing commands,realized automatic conversion from natural language to geometic commands and generated geometry. Test results show that the translation rate overtakes 84.17%.

Key words: Natural language, Geometric drawing, Geometric knowledge base, Pattern matching