The uranium mineral deposit of Qianjiadian depression is the associated mineral deposit found during the oil and gas exploration of Liaohe  peripheral basin. The uranium deposit falls into the category of sandy deposit at interlayer oxidization zones. Study of the reservoir forming condition of uranium in this area shows that: first, uranium is source abundant ;  The widely developed braided channel deposit system in the Yaojia Formation of the Upper Cretaceous resulted in the interlayer structure of permeable sand, glutinite, and water impermeable mudstone with the uranium distributed in the moderate porosity and  permeability sand body; and the source and reservoir of Lower Cretaceous have provided the  rich reduction agents for the uranium mineral deposit forming; The artesian and water catch basin with relative uplift at the edges formed in the gentle occurrence deposit structure tend to make the underground water containing uranium supply the favorable area  along the sand body and unconformity surface ,  forming the uranium mineral deposit near the oxygen --reduction contact, providing the conditions for the further reservoir forming ; predict the reserve of the region of x ×104 t.