The construction of flood land is an important link in achieving the goals of river ecosystem restoration. This paper analyzes, discusses and summarizes the practical cases of river beach land at home and abroad, draws on its excellent ecological design techniques and ideas, and applies them to specific designs. Taking the ecological engineering of flood land at the reach of Lirang Renxian Town, Longxi River, Liangping District, Chongqing as an example, taking local conditions into consideration, this paper summarizes several strategies for the ecological design of flood land, and discusses in detail the two models of ladder pond system and riverbank depression system in the demonstration section, optimizing the design and implementation of flood land, using flood land as a buffer zone to intercept and purify non-point source pollution in surface runoff, has improved the quality of rural river landscape and enriched biodiversity. Explored a construction form of flood land that can integrate various functions such as stagnant water, natural habitat, and landscape needs.