[en] Egongshan volcanic basin is located in the middle Ganhang uranium metallogenic belt, which have produced Linjia, Shuangtoubu, Xinanbu three uranium deposits and many ore (mineralized) occurrences. The study of uranium ore controlling factors shew that mineralization was controlled by the joint of the stratum, structure, the volcanic rocks and intermediate-basic dike. Volcano-sedimentary rocks in Late Jurassic-Early Cretaceous period and Early Permian Anzhou, Qixia group limestone are the main ore layer. EW and NE basement rift are major ore-control structure, the composite parts positioning uranium ore deposits. The NW fracture, inter-formation fracture zone, nappe and detachment fault are the main ore-bearing structures, which are good places for rich uranium fluid flowing and ore-forming mate rial concentration. The NW fractures are ore-controlling structures in the east of basin, the nappe and detachment faults are ore-controlling structures in the west. The volcanic rocks and intermediate-basic dike are not only the uranium mineralization source of heat and fluid, but also are favorable mineralizer and reducer. Comprehensive analysis suggest that the NW fracture and intermediate-basic dike are the main prospecting clues in the eastern of basin and the nappe and detachment faults are the main prospecting criteria in the west. (authors)