Abstract: The gravity gradient belt studied in this paper is very distinct in Eastern China continent.The distribution of seismicity along the belt is clearly different in various sections.From researching the seismicity and the gravity field character in the belt,the paper analyses the tectophysical environment of strong earthquakes that occurred along the front edge of Taihangshan Mountain.The authors discuss the cause of the difference of the recent seismicity along the belt and the problem about the gravity field indicator in strong earthquake zone,and the like.Finally,the study stresses the point that the relationship between gravity field and seismicity is actually a problem of seismotectonic relationship.If the regional gravity anomaly appears in the mobile geotectonic region and major deep-seated rift in the uplifted edge of upper mantle,and if the regional gravity anomaly accompanies sharp change of deep-seated crustal boundary,geomorphology,crustal deformation and so on,it can be regarded as an indicator to distinguish continental strong earthquake zones.