In order to explore the hydrological cycle and hydrodynamic behavior of river channels,based on the collected fundamental data and MIKE SHE model,this paper constructed a distributed hydrological model of Shahe reservoir watershed to simulate the runoff process and determine relevant parameters of this model according to the significance of physical parameters and the calibration method.The results show that MIKE SHE model has good adaptability in the research area.In 2018,the annual runoff process Ensis 0.75,R2is 0.77,and the total runoff RE is 1.3%;In flood season（June-September）,the runoff process Ensis 0.71,R2is 0.73,and the total runoff RE is 7.5%.The simulation accuracy reaches a good level,which can provide basic support for water environment simulation in Shahe reservoir watershed and a reference for hydrological simulation in other similar watersheds.