pressure basin(especially foreland basin) sequence stratigraphy was a important study fields of sequence stratigraphy, sequence filling and overlay styles were significantly difference with them of passive continental margin or extensional fault basin in eastern of china. Based on an integrated investigation of well logs, seismic data,cores and outcrops, duality features of sequence was found and sequence stratigraphy framework of BOHU depression was set up. According to all of them, sequence development mode was built, and causes of duality features were analysed. Because of the special duality features, it was indicated that lithology reservoir or lithology-tectonic reservoir on the bottom of each stratigraphy should be thought as mian exploration targets.