The structural characteristics and the dynamic mechanism of oft-com:office:smarttags" />China’s strong earthquake in the northeastern region show that NE and NW-trending fault formed the present tectonic framework in Northeast China, which controlled the northeastern regions of the geographical distribution of earthquake. The force of earthquake came from the driving of Japan Sea subduction. The 5.2 earthquake occurred between Arongqi and Elunchunqi on June 10, 2008. Analysis of the characteristics of seismic activity showed that there are the orderly migration image and orderly distribution of strong earthquakes.