在言语交际中,语码转换是很普遍的一个现象,同时也是上个世纪70年代起社会语言学关注的重要领域之一。语码转换是指说话者在同一或不同语境下选择不同的语码进行交际以达到不同的意图。语码转换更广泛地存在于双语及多语的地区和国家,中国作为多民族的国家,随着普通话的推广,语码转换成为民族地区的一个特点。 Code-switching is a common phenomenon in verbal communication and is also one of the most important areas of social linguistics that began in the 1970s. Code-switching refers to the speaker in the same or different contexts choose different code to communicate in order to achieve different purposes. Code-switching exists more widely in bilingual and multi-lingual regions and countries. As a multi-ethnic country, with the promotion of Putonghua, code-switching has become a feature of ethnic regions.