The global warming of the climate has caused frequent occurrences of glacial lake outbursts, which seriously threaten the safety of people"s lives and property in the plateau areas. The research on glacial lake outburst has become more and more in-depth. The capacity of glacial lakes is the basic parameter of glacial lake research, and the danger of glacial lakes Sexual evaluation, torrential flooding peak flow and simulated flood evolution have an irreplaceable role. The methods for calculating the storage capacity of the glacial lake mainly include field measurement and the calculation formula of the ice lake capacity. Since the ice lake is mostly located in the high mountain area of the mountain, it is difficult to carry out field measurement for each glacier lake. The calculation method of traditional glacial lake storage capacity is based on the statistical relationship between a large number of glacial lake parameters and glacial lake storage capacity, and establishes the empirical formula of the hail lake storage capacity. Although its goodness of fit is relatively high, its correlation can only measure the area of the hail lake. The consistency of the statistical law with the glacial lake storage capacity is still difficult to complete for the accurate calculation of the ice storage capacity. In this paper, through the literature data compilation and field investigation, the typical analysis of the lake basin is divided into three sections. The mathematical model is established by simulation, and the surface of the ice lake is constrained to be abstracted into a three-dimensional model of the surface in mathematics. The morphological volume is calculated separately, and the expression V=0.0717w²l (w-lake width; l-lake overall length) for calculating the volume of the glacial lake is derived, and the formula is verified by the model. The effective accuracy provides a theoretical reference for the calculation of the storage capacity of the Hulu Lake in the Himalayas region of China.