Taking Tiaoyugang as a case study, the port, which locates at the end of the Huangshayang channel’s of radial sandridges, is being built in shallow tank of tidal channel. First of all, the natural conditions are analysed. Then, based on the calibration of two-dimensional hydrodynamic mathematical model, the results act in accord with the measured data. The tide current field of whole computational region and the characteristic point’s cross flow on before and after the project are discussed. Finally, using the sediment experience formula calculates the yearly deposition quantity in the harbor basin and channel. The conclusion can provide the scientific basis for the port design.