Uranium mineralization is closely associated with Mesozoic-Cenozoic continental red beds in time and space, and regional uranium mineralization was developed during the formation of red beds. Existing red beds can reflect indirectly uranium deposit under better or poor conditions, and hence red beds can act as an indicator of uranium mineralization. The methods of audio magnetotelluric survey (AMT) and soil radon measurement are introduced in the paper. Based on geological data and resistivity characteristics of rocks, the authors ascertained the thickness, occurrence and contact relations of the red layer and the deep characteristics of the concealed fault roughly by using AMT data. Through soil radon measurement, the reliability of the inferred fault is improved and uranium mineralization information is indicated. A comparison with the drilling data shows that the inferred results can reflect basically actual geological situation and play a guiding role in uranium ore-searching in red basin area.