自然语言理解是计算机科学中一个有重要学术意义和应用价值的研究课题。实现自然语言理解既需要句法、语义、语用等多层面的语言学研究，也需要同思维科学、认知科学等多门学科密切配合。本文只是阐述语法知识与语法研究在语言信息处理中的重要作用，既有理论探讨，也有应用实践。笔者以为计算机处理需要的汉语语法研究以及句法分析算法研究，在目前来说，还应该是汉语信息处理研究的一个重点。 Natural language understanding is a subject of great academic and applied value in computer science. To achieve natural language understanding requires not only syntactic, semantic, pragmatic and other multi-lingual studies of linguistics, but also with the thinking of science, cognitive science and other disciplines closely. This article only elaborates the important role of grammar knowledge and grammar research in language information processing, both theoretical and practical. At present, the research of Chinese grammar and syntactic analysis, which the author needs for computer processing, should also be one of the focuses of Chinese information processing research.