Abstract：Both observation stations of the National Space Science Center, CAS, which are in Baodi district of Tianjin city and Yongqing county of Langfang city, observed atmospheric electric field anomalies before the Luanzhou MS4.3 earthquake on April 16, 2021. The Baodi station monitored a mixed electric field anomaly signal of transit clouds and geological activities. The Yongqing station monitored a bay-like continuous electric field anomaly signal, showing a typical hour-scale precursor signal before the earthquake, and its amplitude and duration are significantly higher than the anomalous electric field signal at the Baodi station. Comparing the meteorological activities and space weather activities of the two stations during the electric field anomaly, we infer that although the electric field anomaly signals of the two stations behave differently; the background changes imply the signals of large-scale geological activities. The analysis shows that in the future, it is possible to form an effective identification method by analyzing the evolutionary process of space static electricity caused by multi-source activities. Within a certain range of meteorological activities, it is possible to extract the precursor information of earthquakes of medium intensity or more from the atmospheric static electricity monitoring data.