Against the background of Sino-foreign cooperative education, traditional foreign language teaching is constrained by exam-oriented modes, resulting in students’ inadequate practical language proficiency and intercultural competence. Based on the CEFR Companion Volume, this paper explores the connotation and classification of mediation competence. The paper analyzes the major problems in current foreign language teaching and puts forward targeted implementation paths. Integrating mediation activities into teaching can shift the focus from mere skill training to cultivating students’ ability of meaning construction and cross-cultural communication. It offers new ideas for foreign language teaching reform and talent cultivation in Sino-foreign cooperative education.