Abstract: Abstract：The Kujieertai uranium deposit (also known as No. 512 uranium deposit) is the first typical interlayer oxidation zone in-situ leachable sandstone-type uranium deposit in China. The morphology, size, grade and distribution of this ore deposit are all controlled by the interlayer oxidation zone, which spatially assumes overlapping, multilayer and zoning characteristics. The authors analyzed the distribution, zoning and rocks of the ore deposit as well as the distribution and portfolio features of uranium minerals and valence-state uranium with the purpose of further discovering the matallogenic mechanism of the in-situ leachable sandstone-type interlayer oxidation zones and enriching the theory of hydrogenous uranium deposits, which is of great value in search for this kind of uranium deposits.