The cross-fault deformation observation data from the Yixian seismic station from 2007 to 2012 show that the surface fluid changes caused by rainfall and underground water level change will cause the subsidence and rise of point positions. This effect is seasonal and related to the amount of rainfall (or change in the underground water level). When the rainfall changes seasonally, the leveling observation values show corresponding seasonal changes. When the surface fluid shows low or irregular values, the fault deformation behavior will not exhibit cyclical change. As such, changes in the surface fluid will cause fault deformation behavior. The qualitative and quantitative analyses of these shallow layer anomalies are important for the determination of impending anomalies.