Highresolution singlechannel seismic is one of important methods in marine regional geological survey. It is deployed to discover the shallow stratigrahpy structure, fault, magma active and all kinds of potential geohazards. However, the seismic data is contaminated by different noise. Data processing methods of improving S/N and resolution are discussed in this paper. The processed seismic sections are much better than the original section, which provide high quality data for marine regional geological research.