Abstract: Songliao basin is located in north west of the Pacific continental margin, its main area lies in the middle of Heilongjiang plates.The compression stress field of the upper crust in Songliao basin is different from place to place especially from north to south of the area. With plate tectonics, the authors studied the regional tectonic characteristics of North Harbin in Songliao basin using the long seismic profiles. With seismic analytic interpretation the authors gained that there are uplifts and depressions in East and West of the area, and most of the depressions are in the middle part of the basin. From South to North the sedimentary thickness gradually becomes thin. The earlier fault movements resulted in the tectonic characteristics of the area with alternating uplifts and depressions.

Key words: North Harbin area in Songliao basin, long seismic profiles, seismic reflecting layer, tectonic frame, fault movement