How to implement concessions in Chinese national parks is an urgent problem that needs to be solved. During the pilots of concessions in Three-River Source National Park，a symbiotic model has been explored. This model regards concession as a protection mechanism，which integrates strict protection，inclusive benefits for herdsmen and economic development into a symbiotic overall goal，and penetrates into the multiple main roles of concession. Furthermore，the NGO and the Enterprise-Led concession symbiotic cooperative organization models have been found. Based on the case of concessions in Three-River Source National Park，the symbiotic concession mechanism of national park is further refined. This mechanism may effectively avoid the unbalanced development caused by the independent target coordination mechanism of multiple subjects in the concession process of traditional nature reserves，and may promote the harmonious development of people and nature in national parks at a higher level.