Volume Strain observatory data obtained from the Changping, Huailai, and Zhangjiakou stations were treated by software package EIS2000 produced by Jiangjun et al., Wuhan Institute of Seismology. The results show that the amplitude anomaly of Huailai appeared as pulse type, while that of Changping and Zhangjiakou appeared as tendency anomalies went up or down then retained when shocks occurred, with mid-short-term features. Their reflective values R, respectively equals 0.68, 0.68, 0.56 and totally exceed the confidence level 97.5%, implying a relatively good earthquake-reflecting capacity. Volume Strain observatory data obtained from the Changping, Huailai, and Zhangjiakou stations were treated by software package EIS2000 produced by Jiangjun et al., Wuhan Institute of Seismology. The results show that the amplitude anomaly of Huailai appeared as pulse type, while that of Changping and Zhangjiakou appeared as tendency anomalies went up or down then retained when shocks occurred, with mid-short-term features. Their reflective values ​​R, respectively equals 0.68, 0.68, 0.56 and totally exceed the confidence level 97.5%, implying a relatively good earthquake -reflecting capacity.