Greens pace, forest, and wetland (referred to as "three types of green land") are essential green infrastructures in urban ecosystems and have a signi cant impact on urban ecological space. The construction of the "three types of lands" has a substantial effect on multiple indicators such as urban ecological security, residents' lives, and urban, comprehensive strength. This paper attempts to research the integration and restoration of "three types of lands" to realize the organic integration of the ecological functions of "three types of green land" and further enhance the ecological bene ts. In this paper, sites on the Shanghai green belt have selected to research the fusion and restoration of wetlands, forests, and green space. It could help promote the upgrade of the outer ring green belt's ecological space and further optimize the fundamental environmental base of Shanghai.