Qilian Mountain is one of the regions with the strongest interaction between climate change and human activities on the Qinghai-Tibet Plateau. As an important ecological security barrier in western China，high-altitude mountainous areas with frozen circles （modern glaciers，permafrost and seasonal snow） are the main source areas of Qilian Mountain water resources. Therefore，the “Solid Water Tower” of Qilian Mountain directly accounts for the water and ecological security of nearly 6 million people in Gansu，Inner Mongolia and Qinghai. Based on the previous research and accumulation，this paper focuses on the analysis of the variation characteristics of frozen soil area and reserves，the underground ice reserves of permafrost and the possible melting and releasing water amount，and the impact of dynamic changes of solid reservoirs （mainly permafrost） on water resources in qilian mountains from 2011 to 2018. The results show that the lower bound of the permafrost distribution in the Qilian Mountains has a good zonal law. The heating rate of permafrost is not dependent on the surface conditions. The underground ice that has been melted by the upper limit of permafrost since the last 10 years in the Qilian Mountains It is about 11.78 km3 （11.78 billion m3）；under different climate scenarios，the estimated glacial meltwater runoff will increase until the 1930s and will gradually decrease.