本文从非言语交际的角度对二语口语交际行为进行理论分析。认为基于系统功能言语学,多模态话语分析理论是可以用来分析口语非言语交际能力的。在口语交际的过程中,除了言语可以表现交际内容外,非言语行为通过具体的表现形式,如图像、声音语调、身体动作等多种手段和符号资源进行表达内容。对口语非言语交际行为的研究可以完善对二语口语交际能力的研究,也可以推进大学口语教学模式的改革。 This essay analyzes the theory of second language oral communication from the perspective of nonverbal communication. It is considered that based on systematic functional linguistics, multimodal discourse analysis theory can be used to analyze oral nonverbal communicative competence. In the process of oral communication, in addition to speech can express the content of communication, nonverbal behavior through concrete manifestations, such as images, voice intonation, body movements and other means and symbolic resources to express content. The study of Oral Nonverbal Communication can improve the study of Oral Communicative Competence, and also can promote the reform of Oral Oral Teaching.