Research on the Innovation of College English Teaching Practice Under the Background of AI + Education

With the deep integration of AI technology and education, the paradigm of college English teaching is transforming from tool assistance to ecological reconstruction. This study breaks through the linear thinking of technology application, and focuses on exploring the three-dimensional breakthrough path of English teaching innovation in the intelligent education environment. Firstly, it uses the intelligent hierarchical teaching system to break the dilemma of "standardized output", and construct the dynamic personalized learning graph. Secondly, with the help of immersive multi-modal resource platform, the spatial and temporal barriers of language learning are removed, and the cognitive enhancement from plane input to three-dimensional interaction is realized. Thirdly, it focuses on the cultivation of teachers' intelligent education ability, and facilitate the paradigm shift in the pedagogical relationship from knowledge transfer to intelligent symbiosis. It is found that AI-enabled English teaching innovation needs to go beyond the initial stage of technology superposition to form a synergistic effect in data-driven accurate diagnosis, emotional human-machine collaboration mechanism, cross-cultural digital quality cultivation, and finally build a new teaching mode with both language acquisition rules and intelligent technology characteristics, thus providing a reproducible practice model for the digital transformation of higher education.