Abstract: The intermittent jet device with a heaving buoy is driven by wave energy to transport surface oxygen-rich water to deep zone.In the paper,the effect of the wave parameters,buoy geometric parameters and equivalent damping coefficient on the hydrodynamic behavior of buoy heaving motion is examined numerically. It is found that:1)The average amplitude of buoy heaving response increases with the increase of incident wave height. With the increase of incident wave period,the average amplitude of buoy heaving response increases,and the growth rate increases first,then decreases and eventually increases. 2)With increasing buoy diameter,the average amplitude of buoy heaving response increases. The buoy density plays a minor role in the average amplitude of buoy heaving response.3)With the increase of equivalent damping coefficient,the average amplitude of buoy heaving response decreases. Eventually,by the dimensional analysis method,a prediction equation of relative amplitude of buoy heaving response is established and verified.