Abstract: Multiple reflection is one of the most prominent problems in marine seismic survey. The existence of the multiple reflection affects the reliability and authenticity of seismic imaging as well as the interpretation of seismic data. So far there have been no effective methods to reduce the reverberations especially where the sea-bottom is rough. Two-step predictive deconvolution raised in this article is a method used for reducing the sea bottom reverberations,this method acquires a predicted distance from the results of fine investigation of sea bottom, or from the inversion of direct or refracted waves. Then we reduce the sea bottom reverberations by predictive deconvolution in both common-shot domain and common-receiver domain. It is very effective both in theory and practical record.