Xinzheng City of He'nan Province is located in the central plain of China with semi-arid and sub-humid climate.Per capital water resources is 200 m3,being comparatively scarce.The city belongs to the region where is seriously short of water resources.Groundwater is excessively exploited and surface water is seriously polluted at present.There is a series of serious problems of water resources in the city.Its economic development and well-off society construction are directly restricted with growing population,accelerating urbanization,economical development,and improvement of people' living standards.Three different economic development schemes are considered based on the regional characteristics.Then quota method is applied to predict the water demands at different levels.A reasonable scheme is determined after the analysis of actual water quantity and current water issues.Some suggestions and solutions are put forward at last,combined with the forecasted results of water demands and the situation of existing water problems in Xinzheng City,which can provide a support for decision-making and digital foundation for logical water resource allocation.