Abstract: A new water source site is constructed to solve the contradiction of water resources which is becoming more serious in the city of Shuangcheng and evaluation of groundwater resources is needed.The conceptual hydrogeologic model is generalized according to the hydrogeologic conditions of the study area,and the geologic structure model and groundwater numeric model of the area are established using GMS software for the first time.Considering the influence of natural conditions and exploitation,6 schemes are designed to forecast the groundwater flow field of the study area.The forecast results show that when pumping groundwater with the designed quantity,the maximum central drawdown will not exceed the maximum permitted drawdown in 10 years after the water source site is put into utilization.