Abstract: Because the Zhongshan sluice is seriously damaged and aging, it does not meet the needs of urban construction.It is very necessary to build new sluice with flood control,flood discharge and water storage functions.According to the functional requirements and construction conditions of Zhongshan sluice,a more suitable removal and construction scheme and sluice type are proposed.ANN s-GA fast search and optimization method is adopted to optimize the size of the sluice floor,and the optimization results are analyzed.The results show that the ANN s-GA optimization search process is simple and fast, the search time is short and the search results can meet the need.