Abstract: A new silting calculation method for the reclamation works under the wave and current interaction has been established by improving Wang Yi-gang′s calculation method applied to muddy coast shore reclamation. The coefficients of flood and ebb averaged sediment-carrying capability formula under the wave and current interaction are determined by the measured data of current velocity， wind speed and suspended sediment concentration， and the analysis results are significantly better than those which only consider the tidal flow. The siltation intensity of the eastern Hengsha shoal enclosure engineering has been calculated using the above method and the calibrated sediment-carrying capability formula， and the research results agree with the measured values. Because of considering the wave contribution to the sediment concentration， this model has obvious advantages over the calculation model only considering the tidal action. This model can be further tried to calculate the siltation intensity of the reclamation works placed in the silty and sandy tidal flat.