With the popularity of eco-tourism, the sustainability of its development has become a focus problem in both theoretical and practical fields. Based on existed research, the study summarized the determinants of sustainable development of coastal eco-tourism as four aspects, that are resource environment, economic environment, social environment and management control. And we tested the path and degree of various factors’ influence through the empirical method. Finally, we made suggestions on the development of coastal ecotourism for related departments and enterprises