Abstract: Taking the detection of west Luanxian fault as an example, this paper puts forward a combination mode of comprehensive geophysical exploration method, which is mainly based on shallow seismic reflection wave method and supported by high density resistivity method. Through the verification results of cross-fault drilling combined with geological section detection, it is proved that this set of geophysical methods can achieve good application results in the detection of buried faults in front of mountain, and provide sufficient and necessary geophysical basis and geological guarantee for urban land space planning, major engineering construction and seismic fortification. It also shows the importance of scientific application of comprehensive geophysical exploration methods in the detection of buried faults in the piedmont.