Abstract:Combining with the topography of Huangmao Sea, the Model of Coastal and Ocean Engineering is used in tidal current for Huangmao Sea in this paper. The method of combining curvilinear orthogonal coordinates in the horizontal direction with Sigma mapping coordinates in the vertical direction is used. The comparison between the model results and field data indicates that this model is satisfied to simulate the tidal current field of Huamgmao Sea and it can be applied to calculate the tidal current of estuaries or coastal ocean.