In this paper, we selected the integral point value data of the Shiquan fluid well water level in 7 years from 2014 to 2020 and combined them with the wavelet analysis method and regional structure analysis to study the possible reasons for the long- term abnormal change in the Shiquan well water level. The results show that the water- level anomalies of the Shiquan well mainly occurred after the Jiuzhaigou M7.0 earthquake on August 8, 2017. The wavelet analysis method is effective in extracting high- frequency abnormal information. The strengthening of regional fault activity after the Jiuzhaigou M7.0 earthquake or the change in aquifer permeability around the fault caused by the earthquake may be the direct cause of the long- term abnormal water level in the Shiquan well. The fault activity near the Shiquan section of the Yuehe fault deserves further attention.