Abstract: The advantage of sequence stratigraphy and its application in oil and gas exploration and deve-lopment appeared in these aspects as follows:(1)Seismic sedimentology is a new marginal and cross subject after seismic stratigraphy and sequence stratigraphy.It is a development of sequence stratigraphy and sedimentology,but not a substitute.There are several common techniques named characterization of systems tract,90° phase transformation,strata slice and the seismic spectral decomposition technology.(2)Application of sequence stratigraphy and seismic sedimentology in fine exploration of non-structural traps mainly shows prediction of oil and gas pools related with evolution of sequence and systems tract.(3)The forced regressived systems tract were discovered in lacustrine basin,similar to marine basin.(4)Study on oil and gas sequence stratigraphy in marine carbonate rocks were strengthened.(5)Results of high-frequency sequence stratigraphy,astronomical stratigraphy and palaeo-oceanography events as well as formation and evolution of biological reef reservoirs play an important roles in oil and gas exploration discovery.