Abstract: Located in continent-continent collision between the North China tectonic block and Yangtze tectonic block,the Anhui area formed a deformation belt along the Dabie orogenic belt.The tectonic background of this area is complicated and diversified and fault tectonics of it is fully developed.The Tan-Lu fault zone controls the tectonic pattern of both sides for a long time;there are many faults in Huoshan area on the eastern margin of Dabie Mountains have activities in the late Quaternary.Historical earthquake records show that most historical earthquakes in Anhui area are medium-strong earthquakes,the largest magnitude of them is M6 1/4.According to the latest research on regional seismogeology and historic earthquakes in recent years,this paper sums up and classifies the fracture activity characteristics since the Quaternary Period,especially since the late Quaternary period.The results indicate that the historical earthquakes, medium-sized intensity earthquakes and seismic dense zone of little earthquakes since the beginning of instrumental records in 1970 are the relevance of the fault tectonics activity.