From the theoretical perspective of educational ecology, this study focuses on the pluralistic practices of teachers and students in university foreign language teaching. The results indicate that the pluralistic practice model centered on the “five-step ecological teaching pathway” can effectively improve students’ academic performance, enhance the classroom ecology, cultivate students’ critical awareness in using AI, and generate positive learning transfer effects. The key to successful digital teaching lies in teachers’ transformation from “technology users” to “ecological designers,” alongside the cultivation of students’ critical thinking abilities. This research provides an actionable practical framework for digital foreign language teaching in higher education.