Abstract: In this paper, the actual earthquake cases of Shanxi seismic network from September 2021 to March 2023 are selected. Based on the official cataloging results of China Earthquake Network, the earthquake onset time, epicenter location and magnitude deviation of the cataloging results of early warning stations are compared with the official cataloging results, and the deviation range of basic earthquake parameters is sorted out to discuss the earthquake positioning accuracy of the early warning stations. In general, the data results of earthquake basic parameters located by the early warning stations are reliable and the deviation is small.