In view that the existing north breakwater occupies coastline in the south of No.3 jetty of Zhifu Port area in Yantai Harbor,three reconstruction project schemes are proposed,and the numerical simulation method is used to calculate the wave height of the inner test point in the harbor basin.The results show that,after dismantling the existing breakwater,even if the No.3 jetty was completed,the wave height of the ENE and E to the incident waves and the port front of the whole port was obviously increased because of the lack of the shield of the original north breakwater.The newly-built breakwater has a better shielding effect on the waters of the port,and the distribution of the wave height in the inner test point of the port is generally better than the present situation,among them the scheme of jetty breakwater is more superior.