Abstract: In this paper, field investigation was carried out in the western margin of Fuchashan, and typical fault profiles were found. ESR dating samples of fault gouge were collected. The dating results were（152±30）ka BP and（188±23）ka BP. A shallow seismic exploration line is set up for vertical fault, which reflect the shallow structural characteristics of the fault. The fault profiles and shallow seismic interpretation results show that the fault is located between Proterozoic quartzite and Cretaceous sandstone, with similar structural characteristics and normal fault component. According to the characteristics of fault geomorphology, dating results of fault gouge, shallow seismic exploration results and regional fault structure comparison, it shows that the Chihe-Taihu fault on the Fuchashan segment of the Tanlu fault zone is a Middle Pleistocene fault, and its activity has been weak since the Quaternary. This may be a tectonic background factor mainly composed of small and medium-sized seismic activity in the study area.