Abstract:The seismic structure in northeast China is mainly characterized by the basin group and the northeast-trending faults which controlling basin group. The Songliao basin and the northeast-trending fault controlling the basin are the most representative. The basin is also the region with the strongest seismic activity in the region. Most of the Coulomb rupture stresses triggered by major active faults in northeast China after the Tohoku earthquake increased in the northeast direction, from northwest to southeast, and from southwest to northeast, with gradually increasing characteristics; the distribution in the north-west and near east-west direction is mostly decreasing, and the decreasing value from west to east and from northwest to southeast is a gradual increasing process. The Tohoku earthquake in Japan changed the basic movement trend of northeast China and the main island of Japan. The occurrence of the Tohoku earthquake in Japan changed the original squeezed state of northeast China into a stretched state. In the two trends of movement from 2002 to 2018 and from 2006 to 2018, the impact of the Tohoku earthquake on northeast China is still very significant, and the geodynamic environment in northeast China will still be under the influence of the Tohoku earthquake. It will have a certain influence on the rhythmic characteristics of shallow and deep source earthquakes in the relatively regular northeast China. The fifth activity period beginning in 1999 has ended, or entered the intermittent calm period before the sixth activity period, or it will continue for a period of time, and time verification is required.