The water resources high -effective management is efiective mode for improving water resources dynamic management, and iscomprehensive management measures for realizing conjunetive regulation for surface water, groundwater, reuse water and muliple sources ofwater and improving water resources utilization efficieney, which willoffer technical support for water resources rational collocation and high-effective using.Taking Shiyanghe River as the study case ,aceording to precipitation, evaporation and water use data, the water resourcesmanagement model was established based on MIKE BASIN,and variation characteristics of runof,reservoirs and water demand and used ofirigated area were simulated in the Shiyanghe River Basin. The results show that water resources management model is correct and the chosenparameter and calculated results are reasonable.The simulation results relect variation of water resources and accord with the condition of theShiyanghe River.The water demands in 2015 and 2020 were forecasted with MIKEBASIN model. The forecasted results show that water demandstaken on downtrend from 2010 to 2020 in the Shiyanghe River.The water demands decreased by 23 572.19x10'm' in 2015 than those in 2010.and will decrease by 20 926.77×10'm' in 2020 than those in 2015,which means the water demands show a decrease trend.