In view ofthe problems of post-construction settlement and overtopping of sloping seawall，taking the Wenzhou Shoal phase I reclamation slope seawall as the research object，the post-construction seawall top settlement and cross-section form of the seawall are analyzed. The post-construction average overtopping of seawall under irregular wave is studied through the model test of typical section，and the influencing factors of overtopping are analyzed. The results show that：1）The top settlement of each section for the south dike and the east dike are uneven，and the section form has been significantly changed due to settlement and sediment deposition.2）The post-construction average overtopping of seawall is corrected by adopting the wave oblique incidence coefficient. The influencing factors change of typical sections for the south dike and the east dike leads to the regular change of overtopping，and the overtopping meets the requirements of specifications.