课堂教学媒介语言在外语教学和习得过程中起着重要的作用。它不仅是教学的媒介,也是学生语言输入的来源。本文介绍了国内外对外语课堂教学媒介语言的研究动态,并对其所获成就及局限性进行了分析。 Classroom teaching medium language plays an important role in foreign language teaching and acquisition process. It is not only a medium of instruction, but also a source of language input for students. This article introduces the domestic and international research on the foreign language classroom teaching language, and analyzes the achievements and limitations.