语法化是语言演变的一个过程,自20世纪80年代以来,它已成为语言学研究的一个热点。语法化的主要机制是重新分析和类推,脱语义化、延伸、脱范畴化和腐蚀,隐喻和转喻。借助语法化理论对现代汉语“门”进行分析,可以进一步探究“门”的涵义及用法的演变。从认知语言学的角度对“门”的语法化进行考察,可以得知“门”其实是一个多义范畴。本文对“门”的作为后缀的用法作了初步的分析。 Grammaticalization is a process of language evolution, which has become a hot spot in linguistics research since the 1980s. The main mechanisms of grammaticalization are reanalysis and analogy, de-semanticization, extension, de-categorization and erosion, metaphor and metonymy. Using the theory of grammaticalization to analyze the modern Chinese “door”, we can further explore the meaning of “door” and the evolution of usage. From the perspective of cognitive linguistics on “door ” grammatical study, we can see “door ” is actually a polysemous category. This article makes a preliminary analysis of the use of the “door” as a suffix.