Based on the actual requirements of plane layout of port area，the port area under the cover of the breakwater is subjected to wave physical model tests. And based on the numerical simulation of the MIKE21-BW model，the wave heights of irregular waves incident on the berth behind a vertical wharf at a certain angle are studied. Both numerical simulation and physical model experiment can take into account wave’s the diffraction，reflection and refraction from sea to shore. Comparing the wave height data extracted by the terminal front through the above two methods，the results are in good agreement，indicating that the MIKE21-BW can be applied to the study of nearshore wave propagation and wave condition in the port area providing a scientific research basis for the layout of the port area.