On the basis of an analysis of a large number of samples in a sandstone type uranium deposit in the northern Sichuan Basin, this paper systematically summarizes its REE geochemical characteristics, discusses the REE relations among country rocks, ores, calcite-veins and uranium minerals, and compares these characteristics with that of typical volcanic rock type uranium deposits and metamorphic rock type uranium deposits with hydrothermal origin both at home and abroad. REE in the uranium minerals of sandstone type uranium deposit in the northern Sichuan Basin have characteristics transformed by hydrothermal solution. The uranium mineralization has gone through two stages: the diagenesis and hydrothermal solution transformation.