From the separation of urban and rural areas and the coordinated development of urban and rural areas, China has entered a new stage of development with high-quality development of urban-rural integration as the main trend. The Green Belt, which is located at the junction of rural and urban areas, has a superior geographic location, unique landscape, and diverse land usage. Greenbelt around the city plays an important role in the flow and aggregation of urban and rural factors. Compared with urban park space and suburban ecological space, it has more potential to realize urban-rural integration, boost the high-quality development of Shanghai New Town, and promote the formation of an independent node new town in Shanghai. This paper takes the green belt of Fengxian New Town in Shanghai as the research area. Through literature research, it analyzes the complexity of the green belt, the functions of multi-component and regional connectivity, and finds out the key factors which cause domestic greenbelts easy to plan but difficult to implement. The development goal of the greenbelt as an innovative place for urban-rural integrated development is proposed in this paper. Based on the organic renewal theory, it builds an organic renewal paradigm of the greenbelt in the new city integrating urban and rural development by building urban and rural ecological networks, coordinating the layout of urban green development, guiding the transformation of ecological values, and improving the recreational and residential service system. Finally, this paper guide the land arrangement and construction of the green belt of Fengxian New Town from the aspects of space management and resource overall utilization, which implement the organic renewal theory through planning means, and realize the ecological value activation and effective land renewal of green belt, with a view to providing some reference for the current practice of greenbelt construction in urban suburbs and the research on organic renewal of greenbelt land usage.