Based on the results of the durability test and evaluation of the old jetty，we study the upgrading of the suspended jetty with front sheet piled. Adopting the reinforcement measures such as removing and repairing the damaged concrete and cracks of the old jetty，strengthening the surface with carbon fiber fabric，and constructing cast-in-situ pile to replace class III pile foundation and connecting it with the old structure as a whole，and based on the characteristics of the piled jetty with front sheet pile，according to various factors such as the water depth，mooring facilities，service load，etc. after the upgrading and reconstruction，we upgrade the old 5，000 DWT jetty to 30，000 DWT by construction a new 10 m-wide rear platform to connect the old and new structures as a whole. The application of this technology may serve as a reference for similar upgrading projects.