To solve the problem of Weifang Harbor general plan,numerical model is used to study comparison of project schemes.MIKE 21 software is applied to set up 2D tidal current and sediment numerical models about the Weifang Harbor sea area.Numerical simulations of current,topography changes and channel siltation are carried out to compare all planning schemes.The results show that current and topography don’t change obviously after each scheme.The channel deposition is the key factor to select the scheme.Unitary schemes are obviously superior to separated ones.The scheme with offshore breakwater is not suggested at present.