Through calculating and analyzing of GPS continuous observation data and mobile gravity data,the study results from the data are as follows.( 1) The different movement rate of the fault ends provides conditions for stress accumulation.( 2) The high value zone of gravity anomaly appeared in the monitoring area before the earthquake,and gravity variation contour lines are parallel to the strike of fault; and the process of enhancingweakening-enhancing appeared in the regional gravity field before earthquake. Through calculation and analysis of GPS continuous observation data and mobile gravity data, the study results from the data are as follows. (1) The different movement rate of the fault ends provides conditions for stress accumulation. (2) The high value zone of gravity anomaly appeared in the monitoring area before the earthquake, and gravity variation contour lines are parallel to the strike of fault; and the process of enhancing weakening-controlling appeared in the regional gravity field before earthquake.