Abstract: Qualitative geologic description, tracing of macroscopic geologic phenomena and correlation of logging and seismic stratigraphy are the main study methods of sequence stratigraphy at present Quantitative analysis and microscopic test have been becoming the major study methods of fine, accurate and high resolution sequence stratigraphy. Therefore, sequence stratigraphy will surely develop in the directions of microscope, quantification and high accuracy in the 21 century. Microscopic study mainly includes diagenetic sequence stratigraphy, cement sequence stratigraphy and isotopic sequence stratigraphy. Qualitative study mainly includes mathematical modeling, computer simulation and experimental modeling. High accuracy study mainly includes high - resolution sequence stratigraphy and high frequency sequence stratigraphy. In addition, several new methods and technologies, such as ichnology, high resolution and high accuracy seismic, high resolution logging, palaeomagnetism, X-diffraction,computer and communication, have provided support to research and application of modern sequence stratigraphy and promote its development.