With the diversification of water use in irrigation districts and the increasing water consumption of all water users, it is of great realistic significance to carry out the appropriate water allocation in irrigation districts. The water allocation model Considers the agricultural, industrial, domestic and ecological water use in the irrigation area, aiming at the minimum water deficit of all users. The weight method is used to solve this model and water resources allocation schemes have been worked out both on annual and monthly scale. The results show: The water shortage situation is greatly affected by rainfall. The water deficit is concentrated on agriculture in equal weight distribution programs. The water deficit is a problem of water resources and water supply project. The implementation of water-saving irrigation is an effective way to solve the intense competition in irrigation water.