Abstract: The Guan County fault is the eastern boundary fault of Guantao uplift. Based on the location of the target fault in the seismic exploration section, we obtained the spatial distribution of the Guan County fault, the buried depth of the fault points, and determined the latest active age of the fault by using the results of shallow seismic and borehole profiles. It is speculated that there are still active signs in the Quaternary Period of the Guan County fault, and its latest active age is the Middle Pleistocene.