Abstract: The authors illustrate the characteristics of neotectonic movement of the Tangyin graben (Henan Province) situated in the southern section of the Taihanshan Piedmont fault zone with a NNE trend and point out that the northern part of thi graben is only a semigraben, while its western side is a hinge fault with progressively decreasing in vertical displacement and finally dying out in the northern direction. According to the field seismotectonic investigations the authors made a prediction that the western part of Tangyin County near the hinge point is prone to the earthquakes due to the hinge point's further northward migration. Later, this prediction was verified by an earthquake with 3.9M. just occurring in this part in Oct. 1978.Moreover, the Anyang city, located on the intersection of the Taihanshan fault zone with a NWW pivotal fault, is an another earthquake-prone area due to the fea-ssible location to concentrate tectonic stress, and then it must be put under monitoring.