This study, grounded in cultural confidence, constructs and implements the Curriculum-Ideology and Politics-Multimodality (CIM) teaching model tailored for university English courses in arts and sports majors. By integrating multimodal resources, it embeds ideological and political education into English instruction to enhance students’ language proficiency and cultural confidence. Effectiveness was evaluated through questionnaires and experiments at Changsha Normal University as a case study, detailing construction steps, pathways, and outcomes. Results indicate improved cross-cultural communication skills and ideological literacy. This work innovatively combines cultural confidence, course-based ideological education, and multimodal theory, providing a novel practical framework for university English teaching.