Daqing area is located in the north-central part of Songliao basin in Songliao-Zhangguangcailing structural belt, and the seismogenic structure is mainly affected by the thrust generated by the subduction of Pacific plate to Northeast Asia continent. Since earthquake records, 6 earthquakes with Ms≥4.7 have been recorded in key work areas, including 2 earthquakes with Ms ≥ 6 and 4.7 ≤ Ms