Abstract: National park is a type of protected areas. The delimitation is the basis of the planning and construction of national parks, and the most direct reflection of the protection and management goals. Based on the functions and management goals of national parks, this paper summarizes the experience of national parks in the pilot period. Combined with existing researches on the boundary demarcation process of protected areas, it proposes the process of scoping the national parks. Taking the Qinghai Lake Basin as the main research object, it analyzes the background of natural resources and management feasibility of the proposed Qinghai Lake National Park evaluation area. Through sorting out the status quo of the existing protected areas, and based on the integration and optimization of the protected areas, it puts forward suggestions for the scope of the proposed Qinghai Lake National Park, and provides a reasonable reference for the demarcation of newly established national parks.