Abstract: The traditional high?frequency sequence analysis as the most commonly used approach focuses on the interpretation and correlation of seismic markers constrained by well logging data, but it could not be applied in the area with few well data and low?resolution seismic profiles. In this paper, a new approach on high?frequence sequence analysis based on seismic sedimentology is presented, and a new seismic?sedimentological approach for mapping high?frequency sequence by a case study is introduced. First, we used seismic sedimentology to investigate high?resolution horizontal (plan view) depositional elements is the third?order sequence stratigraphic framework; then, we examined their high?frequency sequence?stratigraphic context in vertical and 3?D view. The new approach included three steps: 1)converting a 3?D seismic volume into a lithology volume; 2)defining the high?frequency sequence boundaries by using seismic geomorphology; 3)adjusting the high?frequency sequence stratigraphic studies under the control of frequency decomposing profile. The new interpretation procedure shifts the emphasis of high?frequence sequence stratigraphic studies from interpreting vertical seismic profiles to analyzing more horizontal, high ?resolution and seismic ? geomorphologic information, which allows the tracing of high ?frequence sequence stratigraphic boundaries and the 3?D imaging to be realized more quickly and accurately