Abstract: In this paper, the Hongruhe River Basin is taken as the research object. Based on five water supply sources:reservoir, river, groundwater, local surface water and other water resources and the "multi-source multiuser" water resource allocation scheme of 12 water demand districts and counties, the system simulation model is constructed and the visualization software is developed. The model uses the rainfall data from January 1997 to December 2006 in the basin and the water demand in 2030 from the water demand forecast to simulate the model. The rationality of the simulation model and the water resource allocation scheme are evaluated by the calculation results of the water supply guarantee degree. In addition, the adaptability of the model is increased by the setting of adjustable parameters. The results show that the model has a good effect on the study of the relationship between supply and demand of water resources and the rationality of existing water resources allocation scheme, as well as the simulation prediction of the guarantee degree of regional water resources allocation in each year.