A reasonable and accurate forecast of the depositional rate after reclamations in muddy coast is a challenge of the engineering sediment search.Based on the suspended fine-sediment deposition prediction model after reclamation proposed in the literature,the influence of wave actions on siltation after topographic changing works is focused on.Two-dimensional horizontal large-scale tidal current and suspended sediment transport model and wave model are set up,with which,siltation intensity in work area under different waves is calculated.The relationship of coefficient k0,by which waves influence on siltation is characterized,between relative wave height is established.The siltation intensity calculated by the formula proposed in the literature,whose coefficient k0 is obtained by the relationship above according to actual waves in engineering waters,well agree with the actual amount.