[en] Based on the analysis on the size and thickness of sand body in Mengqiguer deposit, and the shape of ore body in section, this paper discussed the relationship between sand body and uranium mineralization, pointed out that in the process of uranium mineralization, the stability of the sand body is a favorable environment; the change of micro-faces such as sand body thickness, number of muddy intercalation layer and grain size significantly affected the precipitation and enrichment of uranium and the formation of ore body. (authors)