In view of the problem that the old wharf can not meet the use demand,the upgrading technology of the old wharf is systematically analyzed and summarized.Taking a general wharf in Nantong as an example,this paper analyzes the characteristics of upgrading and reconstruction,and discusses the service life and function of the wharf after the reconstruction from the demonstration of the design scheme.Based on the analysis of the test results of the old wharf structure,the reconstruction scheme is determined on the premise of realizing the functional objectives,and the necessary technical demonstration is carried out from the aspects of structural safety,usability and durability.In addition,the key construction schemes for wharf reconstruction are summarized.The research results can provide reference for the upgrading of similar wharves.