Abstract:For water-scarce cities, the greening irrigation water plays a decisive role in the construction of ecological function, and the use of water reservoirs as greening irrigation and storage facilities plays an increasingly important role in the urban ecological construction. Taking the construction of water reservoir in Yongchang Road in Jinchang City of Gansu Province as an example, the function requirements and application of key technologies in the construction process of green irrigation reservoir facilities and the impact on urban ecological environment in practical application are analyzed. Through the case analysis, the aim is to provide the useful reference for green irrigation construction in other similar cities.