Chengbei oilfield has been found for over 30 years，but the progressive exploration result here is not satisfied. It is imperative to finely describe tectonic-sedimentary characteristics in the Chengbei low uplift and neighboring regions in Bohai Sea area and analyze the exploration potential to ease the stress of increasing oil reserves and productions on Chengbei oilfield. The tectonic characteristics，stratigraphy and stratigraphic contact，and sedimentary controlling factors in the study region were described again or redefined using sequence stratigraphy analysis，paleo-geomorphology restoration and comprehensive reservoir prediction technology. The research results show that the Chengbei low uplift and its surrounding area can be divided into 4 tectonic belts：drape structural belt in the low uplift，steep slope zone in the south，gentle slope zone in the north and overlapping belt pitching out into the west. In the Paleogene，fan delta deposited in the south steep slope zone was controlled by a ravine-fault system，and braided river delta deposited in the north gentle slope zone was controlled by a ravine-slope break system while that deposited in the west was controlled by a trend-transform zone that pinching out into the west. The Paleogene fan deltas and braided river delta sandbodies have better reservoir conditions with provenance from the Chengbei low uplift，which could form structural and stratigraphic overlap traps combining with the south and north boundary faults and stratigraphic overlap belts.