Abstract: This study explored the deep occurrence characteristics of the Malugou fault and its secondary faults in the study area based on the data obtained using audio-frequency magnetotellurics (AMT), aiming to provide a basis for the drilling layout and improve the effects and benefits of the geological exploration of uranium deposits. The feasibility of the AMT method was demonstrated by analyzing the response characteristics of the forward theoretical model of the Malugou fault and its secondary faults. Based on this, this study deduced and interpreted the inverted resistivity cross-sections by combining geological setting, the electrical parameters of rocks, and the drilling data collected. As a result, the deep development characteristics of faults in the study area were roughly identified, and the details are as follows. The Malugou fault (F101) has an NW strike, a dip angle of approximately 80°, and dip directions of NE and SW along sections X501-X502 and sections X502-X506, respectively. Secondary faults F102 and F103 have an NW strike, a dip direction of NE, and a dip angle of 75°~80°. The above-mentioned faults are characterized by large cutting depths and high dip angles.