Conversation, the main carrier of classroom interaction, can reveal the internal mechanism of the development of teaching and learning, which is very important for exploring the complex interaction in collaborative learning. This paper firstly summarizes the challenges of collaborative learning research,including ignoring the situation, dynamic, multilayer, universality, and diversity of activities. Then,conversation analysis is introduced, and the key points including corpus, context and three hypotheses of this method are summarized. The paper expounds the advantages of conversation analysis...