Abstract: Based on the achievements in seismological fluid research, we analysed the time and space patterns of groundwater level anomalies in the period of 1985-1994 in Tianjin area, the main results are as follows:(1) The 1989 Datong earthquake with Ms6.1 shows a adjusting change of regional tectonic activitIes;(2) The Cangdong fractured zone is still a main active fractured zone in Tianjin area;(3) It is found that the stress concentration position in Cangdong fractured Zone showed a kind of transfered trace from the southwestern section to the northeastern section.