Abstract: Through literature review and other methods, this study examines the underlying principles of physical education teachers' role in health education, the practical difficulties they face, and the optimized approaches to support them in fulfilling this mission. The study finds that physical education teachers' commitment to health education is an essential response to the "Healthy China" strategy, a critical choice in China's foundational education reform, and a necessary step for promoting students' physical and mental well-being. Currently, physical education teachers face several challenges in health education: insufficient emphasis on the health education, relatively low health education expertise among teachers, the absence of certification, and the questions around the professionalism and legitimacy of health education roles. Other issues include the lack of role recognition, low initiative and motivation among teachers, inadequate support mechanisms, difficulty in fulfilling reasonable demands related to health education, and vague definitions of responsibilities that dilute teachers' awareness of their core roles in health education. To address these challenges, proposes are to optimize health education training in pre-service physical education teacher programs by expanding specialized in-service health education training, use curriculum-based certification to establish a comprehensive health education certification system, strengthen teachers' professional identity in health education, create platforms for teachers' professional growth, emphasize the health education work of physical education teacher, establish standardized performance evaluation criteria, and clarify teachers' job responsibilities in health education while exploring sustainable school-based health education mechanisms.