Abstract: The seabed is the lowest boundary of sound propagation in the sea, so its acoustic characteristics have a major effect on the sound field distribution. In the last sixty years, modeling of the acoustic properties of seabed sediment has made much progress; however, it still does not satisfy the demands of modern underwater acoustic technology. In this article, based on the composition of the seabed, we present a geoacoustic model to describe the interaction of sound waves with the seabed.