Abstract: Under the new era background, in order to achieve organic renewal and sustainable development of community public space, the author attempts to explore a development path suitable for the integration of organic renewal and sustainable development of high-density urban public space through practical research and analysis. On the basis of summarizing the spatial characteristics and attributes of community gardens in Shanghai City, this paper proposes the four-level structure and three development approaches of participatory construction of community space, and gives suggestions on how to build the community from the perspectives of government publicity and guidance, social organization promotion and mining of community leaders. It analyzes how community gardens can achieve multiple co-governance through public participation, to make community building an organic part of daily life.