语码转换存在于语言接触和跨文化交际中,既是一种语言现象,也是一种社会现象。本文从社会语言学研究路向进一步分析语码转换现象,旨在揭示语码转换的动因和功能。本文研究发现语码转换的根本动因是语言的社会性,是对社会规约的顺应;人们在交际中倾向于进行语码转换又不纯粹是对社会规约的顺应,还在于语码转换在交际中有其社会功能。 Code-switching exists in language contact and cross-cultural communication, both a linguistic phenomenon, but also a social phenomenon. This article further analyzes the phenomenon of code-switching from the perspective of sociolinguistics to reveal the motivation and function of code-switching. This study finds that the fundamental motivation of code-switching is the sociality of the language and the adaptation to the social statute. People tend to use code-switching instead of purely social compliance in communication, Has its social function.