Abstract: This paper is based on the earthquake events issued by the early warning system since the trial operation. The processing records of JEEW and EEW processing systems were counted and analyzed respectively, the results are as follows: ① the first report time of JEEW system is less than 10 seconds. The mean magnitude deviation was 0.69. The deviations of epicentral distance were all within 10 kilometers, and the deviations within 5 kilometers accounted for 89.36% . The first report time of EEW system within 10 seconds accounted for 64.7%, the mean magnitude deviation was 0.6, and the deviations of epicentral distance within 10 kilometers accounted for 76.47%. ② For the earthquake events with magnitude ≥ M3.0, the results of the JEEW system show that the first alarm time is 4~6 s, the magnitude deviation is 0.3~0.6, and the epicenter location deviation is 0.7~3.5 km. The result of EEW system shows that the first alarm takes 3~8 s, the magnitude deviation is 0.0~0.6, and the epicenter location deviation is 1~5.2 km. Therefore, the seismic event warning time in this magnitude range is short and the location result is relatively accurate.