In this article we collect all the results published by China's auto earthquake information release system between January 2015 and August 2020. By selecting a total of 1863 natural earthquake events in China and comparing with the formal earthquake information release catalog,we find that the earthquake parameters from the China's auto earthquake information release system,have the average 2s deviation of the origin time,the average about 8km deviation of the epicenter position,the average about 9km deviation of the focal depth,the absolute 0.25 average deviation of magnitude,and the average 0.1 deviation of magnitude higher than formal earthquake information release catalog. About 176 seismic events that reached the output magnitude standard were underreported,mainly due to sparse stations in the local area,unreasonable distribution of stations,and coda interference from large earthquakes or foreshocks. The distribution of events with large deviations at the origin time,epicenter location,and focal depth is similar to underreported events,and they mostly occur in areas where the station density is low or the velocity model differs greatly from the actual one. The magnitude deviation is mainly related to the rage of magnitude and the location of the epicenter,while the magnitude of seismic events between 3 and 5,the magnitude results are the most stable and while the magnitude greater than 6,the magnitude results are less reliable. In addition,the magnitude deviation value has no obvious relationship with the regional distribution,but the deviation direction is of regional characteristics. This paper conducts a more comprehensive statistical analysis of the operation of the auto earthquake information release system,puts forward suggestions on the improvement and perfection of the system and can help deepen the understanding of the results and improves the application effect of the system.