Abstract: Abstract：The Paleogene in the northern Jiangsu basin may be divided into three tectonic sequences in light of the plate tectonic theory and sequence stratigraphic theory; they are Paleocene(TS1), Eocene(TS2) and Oligocene (TS3). On that basis, maps of lithofacies and paleogeography of tectonic-sequences in various geologic epochs of the Paleogene in the Subei basin have been compiled with the tectonic-sequence boundaries and the maximum flooding surfaces as the boundaries and the lake basin lowstand systems tract and lake basin highstand systems tract as the map-making units, and the lithofacies and paleogeographic characteristics and evolution of various tectonic sequences have been studied. These provide a more reliable basis for the prediction and assessment of favorable areas for petroleum exploration in the Subei basin.