Abstract: The purpose of oral English teaching(which is) based on the dialogue function of language is to foster learners' linguistic competence,social linguistic competence and strategic skills by oral communication.in terms of Lotman's "Interactionism",and for the aim of improving the integrated language quality of students to construct and develop the College Oral English teaching mode: teacher-learner interaction,learner-learner interaction,voice interaction,psychological interaction,interaction between teacher,l...