Abstract: With the influence of pore water concerned,a Winkler beam model was adopted to simulate the interaction of pile and soil based on Biot consolidation theory.The response of seabed under waves was obtained and the horizontal motion equation of pile built.The influences of porosity,permeability coefficient,pile-soil rigidity ratio and wave circular frequency on horizontal steady state response of pile was analyzed,which provides foundation for ocean exploitation,pile detection and so on.