Abstract:How to improve signal-to-noise ratio and resolution of seismic data is key of seismic dato processing.Based on analyzing AVO characters of seismic CMP gather and stratigraphic absorption passing different path by offerent offset signal,the paper discovered that for different frequency component of seismic signal at different offset signal at a certain moment,the relation between frequency and offset x can be described by polynomial and then the technique of fitting a zero-offset seismic trace in time-frequency domain based on time-frequency analysis and fitting of polynomials has been proposed.Meanwhile,Wiener filter in time-frequency domain designed of signal-to-noise ratio of mufti-traces signal evaluation overcame the shortcoming of insufficient to suppress noise in ordinary technique of fitting of polynomials.