Abstract: This paper first introduces the general situation about the underground fluid networks and data tracking analysis of Shandong geophysical networks. Then the records of six types of abnormal change events produced by data tracking and analysis work from 2017 to 2020 are summarized and sorted out and the co-seismic effect in geophysical events are analyzed. The results showed that: the main reason affecting the quality of fluid tracking analysis in Shandong Province lied in the observation system; the problems existing in the tracking analysis can be solved by corresponding measures; a few water level observation wells had co-seismic effect, and the ability of most observation wells to monitor crustal stress changes is gradually weakening.