With the rapid development of cities, China’s green ecological space has been squeezed, and many cities are facing the problems of lack of forests, less greenery, and fragmentation of ecological space. Therefore, one of the directions that need to be studied urgently is how to handle the contradiction between man and nature and achieve the sustainable development of urban green space through scientific greening. Taking Chengdelin in Xiong’an Green Expo Park as the research object, under the guidance of the theory of “near-natural forest”, the afforestation method and the landscaping method are combined. Furthermore, the construction principles, models, and management methods of “near-natural forest” are systematically studied, and it constructed a healthy and sustainable forest phase. Finally, combined with the current construction of “near-natural forests” in China, it put forward targeted suggestions to provide new ideas and references for the future scientific structure of “near-natural forests”.