Exploring the mechanisms and models for realizing the value of ecological products in national parks is the key to accelerating the ecological civilization construction in national parks and promoting the transition from 'mountains of green' to 'mountains of gold'. This paper endeavors to construct a social-economic-natural composite ecosystem framework for national parks while also categorizing the ecological products. Taking Shennongjia National Park as a case study, it delves into the paths and mechanisms for realizing the value of ecological products within national parks, and constructs a model for such value realization. The results indicate that: (1) the national park composite system comprises interconnected social, economic, and natural ecosystems, forming a cohesive and interactive whole. (2) The ecological products within national parks exhibit distinct characteristics, such as biological productivity, resource scarcity and human profitability, regional integrity, policy dependence, and balance of interests. Proper identification and classification of these products are helpful in ensuring the stability and sustainable development of the composite ecosystem, leading to effective value realization. (3) The ecological products within national parks are typically divided into three categories: public, quasi public, and operational products, with a value realization path system composed of government-led, community-led, market-led, and multi subject composite paths completes the value realization. (4) The value realization mechanism of ecological products in national parks encompasses four integral components: ecological protection mechanism, economic development mechanism, community progress mechanism, and coordination guarantee mechanism, which serves the three goals of ecological preservation, industrial development and community revitalization. (5) There are difficulties and challenges persisting in the process of realizing the value of ecological products in national parks. Taking ecological protection as the primary task, tourism development as the realization path, community revitalization as the core goal, this paper constructs the 'ecological protection-tourism development-community revitalization' symbiotic model tailored for Shennongjia National Park. Additionaly, it puts forward the eco-tourism model of realizing the value of ecological products, so as to coordinate the contradiction within the structure of the composite ecosystem of Shennongjia National Park and realize the maximization of the value of ecological products in national parks. In summary, this study makes a useful discussion for enriching the theory of value realization of ecological products. The symbiotic model of national parks and eco-tourism model will provide important scientific basis and decision-making reference for the value realization model of ecological products in national parks, and provide a more comprehensive and effective path and model.