Exploring the mechanism and path of realizing the value of marine protected areas’ ecological products is conducive to maintaining the normal function of marine protected areas ecosystem, providing more high-quality ecological products to meet the growing needs of people’s beautiful ecological environment, and promoting a virtuous circle between green development and nature protection of marine protected areas. From the perspective of ecotourism, this paper analyzes the realization mechanism of the value of ecological products in marine protected areas, and explores the sustainable supply path of high-quality marine ecological products. The results show that: ① in order to realize the value of ecological products in marine protected areas, it is necessary to identify ecological products, clarify their property rights and calculate their ecological value. ② Government, community residents, enterprises and tourists play the role of leaders, product suppliers, implementers, and product consumers, respectively. ③ The value of supply and cultural service products is realized through the market transactions of catering, accommodation, cultural entertainment products among community residents, enterprises and tourists. The government plays the role of supervision and management. The value realization of regulating service products includes property rights trading among government, community residents and enterprises, health and leisure products transactions among community residents, enterprises and tourists, as well as tourism ecological compensation among government, enterprises, tourists and community residents. In the process of developing ecotourism, designing the value realization path of different types of marine ecological products based on the relationship between stakeholders can provide an effective reference for the sustainable development of marine protected areas.