Abstract: The high-density resistivity method, with the the advantages of small dot pitch, high data-acquisition efficiency and high detection accuracy, has been widely applied in geothermal exploration. Using the method, 11 survey lines are set up in Huanglin area of Jiangxi Province, the 2D underground resistivity model is established by inversion calculation of measured resistivity data, which visually describes the resistivity variation characteristics of each section at different depths, and the underground extension and occurrence variation of NE, NW and NNE faults are analyzed to predict the favorable location of geothermal water. The interpretation results show that the surrounding rocks in the study area have high resistance, the resistivity of fault areas has distinct lateral variation and longitudinal extension, and the fracture zone has obvious low resistance due to water cut. The water abundance in the interaction zone between NE Anyuan-Yingtan deep fault and NNE fault is good, and the integrated exploration and developing well further reveals that the geothermal system in the study area is convection type. When the designed drawdown is 50 m deep, the water inflow can reach 920.80 m³/d with measured water temperature of 44.5 ℃, showing a good development and utilization prospect.