A magnitude 6.6 earthquake occurred in Jinghe, Xinjiang, on August 9, 2017. In this paper, the observation data of the Wenquan horizontal pendulum is taken as the research object. We study the influence of temperature and water level on the observation data of the Wenquan horizontal pendulum. The results show that horizontal pendulum spa NS to lag temperature is about 114 days, and the correlation coefficient between them is -0.620195. The temperature difference between the temperature and the EW is 44 days, and the correlation coefficient between them is 0.8449978. The temperature of the hot spring is about 19 days, and the correlation coefficient between them is -0.6886279. Wenquan horizontal NS to lagging water level about 17 days, the correlation coefficient between them is -0.6886279. Secondly, the regression model was used to select the appropriate regression model to eliminate the influence of temperature and water level on the Wenquan horizontal pendulum. The regression residual sequence is analyzed. The abnormal characteristics of the hot spring level before the M_S6.6 earthquake include:(1)NS component after October 29, 2015 shows an annual distortion, and after the earthquake, in August 11, 2017 turns to N tilt, and ends as an abnormal. (2)EW component from May 13, 2016 on began to show a continuous E tilt change. When the earthquake occurred, the E tilt reaches as much as 0.88″.