Immersion language teaching has unique value and characteristics, which is rooted in the language’s own characteristics and can save time and effort to cultivate students’ foreign language proficiency. This paper proposes a new online university English teaching model, which utilizes the virtual reality features of the metaverse to build an interactive immersive learning environment for English education. Six classroom transcripts were selected as examples of the study lessons, which were analyzed quantitatively by S-T analysis, time series analysis, and the improved Flanders Interaction Analysis System and. The results of the study show that the effect of immersive learning environment on language learning has a certain relationship with the cognitive ability of individuals, and the fluctuation of the speech ratio between the teacher and the students in different teaching sessions is small, and the average Ch value of the lesson cases is 0.4080, and the overall teaching mode of the course is presented as a dialogic teaching mode, which proves that the immersive language learning environment designed in this paper is able to improve the interaction in the teaching of English.