Under the sociocultural theory, this paper sorts out the study on the interactional discourse in the second language classroom home and abroad, aiming to combine the sociocultural teaching perspective with the strategies for classroom interactional discourse construction. Through applying the Adaption theory, Internalization theory, "Zone of Proximal Development" theory in the practice of second language classroom, the paper proves the promotion of the sociocultural theory on the study of interactional discourse in second language classroom. And the theoretical study is enhanced ultimately in the question-and-feedback between teacher and students in the second language classroom.