Water resource shortage problem of the earth is getting more and more serious, which directly influences the sustainable development of the nature, economy and society. The healthy water circulation and water resource regeneration are based on the rational water space for regulation. Wetlands are irreplaceable spaces of water regulation and have prominent functions of regulating and storing surface runoff and purifying water body due to their special waterphysical property and characterized biogeochemical function. Human activities have destroyed a large number of wetlands, that made hydrological space effects of wetlands obviously drop and greatly weakened water regulating function of wetlands greatly. Rational collocation of wetlands in a basin is one of the important foundations in harmonizing and guaranteering water use for ecology, production and living in the basin.