Abstract: Currently, the amplitude and waveform information of seismic data are increasingly applied to the identification and evaluation of lithologic trap. The requirement of relative amplitude preserve of seismic data is higher and higher. But the techniques and flow of seismic processing mainly focus on structure imaging, and its effects on amplitude are often ignored, so the processing results are often badly amplitudepreserved. Based on real and model data, this paper analyzed the characteristics of amplitude preserve of surface wave suppression, geometrical spread compensation and predictive deconvolution techniques. On the basis of amplitude-preserved analysis, optimized processing methods and flow were proposed. The result showed that the amplitude features of seismic processing results could be preserved better

Key words: lithologic trap, relative amplitude preserve, deconvolution, surface wave, geometrical spread