Abstract: On the basis of the views that the anomalies are positive in upheaval area and are negative inde pression, the typical anomalous of 8 wells suchas Shuang qiao 1, Dontai Tianchuan wells and others before the earthquake arededuced. Using the anomalous data of waterdynamic state in Tianjin area before moderate and moderately strong earthquakes occurred in Tianjin and adjacent area as well as in Capital region and adjacent area from 1988 to 1999, thededuced results are tested. The result shows the situations of well's anomalies are consistent with thededucingresults. So the typical features of water level and well pressure of the 8 wells are obtained in Tianjin waterdynamic observation Network. It has a certain practical significance to streng thendetermination of anomalies of waterdynamic state in Tianjin area.

Key words: Tianjin area, Waterdy namic state, Anomaly, Ty pical feature