Abstract: The high density resistivity method has the advantages of high efficiency, high observation precision etc. The method is used in engineering geology and hydrogeology exploration widely. In this paper high density resistivity method was used in geothermal exploration in certain work area. By delineating the geothermal heating channel fault, the results proved high density resistivity method is feasible in geothermal exploration. The apparent resistivity data are collected by using Wenner device, the inversion results clearly inflect the resistivity distribution underground. It provides the geophysical basis for geothermal exploration.