Abstract:78 digital seismic events(ML ≥ 2.0)recorded by the Henan Digital Seismic Network in Fanxian County and its adjacent regions from January 2008 to September 2015 were screened out through the double difference earthquake location method for precise relocating. Compared to previous location,which is showed in the results,the relocated relative position of seismic source is more concentrated. The earthquakes which are closely associated with fault distributed along Liaocheng-Lankao fault zone in NE direction. In addition,82% earthquakes are concentrated at 7~8km,which are more concentrated than before. On this basis,the CAP method is used to study the focal mechanism solution of ML ≥ 3.0 earthquake in the region since 2008. The results are as follows:11 of 14 earthquakes' strike,which is along NE in pitch surface one,is in accordance with precisely positioned distribution direction of the epicenter. 9 of 14 earthquakes' azimuth of P axis are between 50 and 100 degree and its average value is about 75 degree,which is accordance with the direction of compressional stress in North China. It is therefore concluded that there is a certain correlation between Liaocheng-Lankao fault and the earthquake activities in this region.