Abstract：The seismic sedimentology considers that seismic events are characteristic going across time surfaces. There are a few of practical techniques to be studied about seismic sedimentology.The current used main techniques include 90° phase transform, strata slicing and frequency-division interpretation. After initial application and study of these techniques, the paper considered the angles seismic phases rotated are decided by the seismic phases associated to high-frequency sequence interface of targets, so the phase rotation maybe is not 90°. Meanwhile, the 90° phase rotation could not really improve the resolution of seismic data. Strata-slicing is more approaching to time surface than time slice and horizon slice, but the strata slicing technique doesn't consider the change of sedimentary velocity rate with time. The vertical density of strata slicing and its reflected real information are limited in seismic resolution. So, it needs comprehensive analysis of geologic information reflected by strata slicing. It should combine frequency-division interpretation with time-frequency analysis,when using frequency information for stratigraphic sequence, because the former puts emphasis on considering the difference of geologic information reflected by using different frequency band; while the latter pays more attention to strata cycle reflected by the change of frequency vertically
