Abstract: Taking groundwater exploration for the rural drinking water safety project in Guangxi Region of the 12th FiveYear Plan as an example, the author uses the high-density electrical resistivity method in search of groundwater in complex geological structures like carbonaceous mudstone, ampelitic limestone, siliceous rock and fault structures, and achieves good geological effects, which may serve as the preferred geophysical prospecting method in groundwater exploration in similar complex geologic structural areas.