《大唐西域记》是中古到近代过渡时期的重要语言材料,对于研究当时的语法现象具有重要的史料价值。本文以《大唐西域记》中的全部“以”字用例为基本材料,从语法意义、语法的作用的角度对本书中的全部“以”作定量定性的分析,旨在揭示《大唐西域记》中“以”字的语法特征,以及“以”字在汉语史上的演变情况。 “Datang Western Register” is an important linguistic material in the transitional period from the Middle Ages to the modern times, and has an important historical value for the study of the grammatical phenomena of that time. Based on the use cases of “” in “Da Tang Xi Yu Ji”, this dissertation analyzes all the “” in this book from the perspective of grammatical meaning and grammar, Reveals the grammatical features of the “” character in “Da Tang Xi Yu Ji” and the evolution of the “” character in Chinese history.