In order to investigate the possible immersion in Laohekou city after the Wangfuzhou water power plant being completed,the analytic element method has been used to analyze the groundwater distribution in the urban area which is nearly 12 km\+2.After quantitative calculation and optimigation,the feasibility and effect of the drainage scheme for the urban have been studied,and satisfactory result achieved.The reseach results fully show that the AEM is of efficiency and flexibility in solving such largely regional groundwater problems.