Reservoir capacity is one of the important parameters that cannot be ignored in the construction and operation management of water conservancy projects.The introduction of 3d Max software compares the traditional storage capacity calculation method with the geographic information processing software ArcGIS and Global Mapper to calculate the storage capacity,aiming to get rid of the traditional data analysis and formula calculation and ensure the accuracy.Intuitively show the process of reservoir water level change.The results show that 3d Max can accurately calculate the storage capacity and visually display the inundation terrain of each water level of the reservoir,which can provide an effective reference for construction.