This study aims to explore the teaching strategies for integrating Hainan culture into college English courses and their impact on students’ learning outcomes. Drawing on relevant statements on cultural confidence, the research employs multiple methods, including questionnaires, in-depth interviews, classroom observations, and performance analysis, to systematically analyze the application effects of Hainan cultural elements in English teaching and student feedback. A survey of 200 students from a university in Hainan revealed that 90% of the students support the integration of Hainan culture into English teaching, 85% believe that this teaching method enhances their learning interest, and 80% think it helps improve cultural awareness. In-depth interview results show that both students and teachers agree that integrating culture into teaching not only improves English proficiency but also enhances cultural pride. Classroom observations indicate that students in the experimental class have significantly higher participation and interaction frequencies compared to the control class. Performance analysis shows that the English scores of students in the experimental class increased by 15%, significantly higher than the 5% increase in the control class. Comprehensive analysis results demonstrate the effectiveness of integrating Hainan culture into college English teaching. It is suggested that future teaching further enrich cultural content, innovate teaching methods, strengthen teacher training, improve evaluation mechanisms, promote interdisciplinary cooperation, and utilize external cultural resources to enhance students’ cross-cultural communication skills and overall competence.