"Classroom interaction"as a distinctive research theme in classroom video analysis has been in the process of exploration,development and emergence for more than 30 years since the large-scale integration of classroom research and video technology began in the 1990s.The current research on classroom interaction video analysis is moving from"discourse"interaction to multimodal data fusion and intelligent technology-assisted analysis which focus on"body""emotion""context"and"environment".This paper compares the research lineage of classroom interaction video analysis,and then compares the research methods and coding tools involved in the empirical studies of classroom interaction video analysis over the past 30 years.The development of classroom interaction video analysis system is the main line,and the changes of research perspectives in this field are analyzed from four aspects:analysis content,classroom environment,interactive subjects,and analysis technology.Finally,the development trend of classroom interaction video analysis research is explained from four aspects:data collection,research perspective,research philosophy,and technical support.
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