When the irregular slope surface of a riprap seawall lies below the sludge surface of a seawall-side hydraulic reclamation area，the following problems deserve further discussion：1）The conventional process of vacuum preloading combined with surcharge preloading featuring drainage plate installation fails to achieve a vacuum effect due to connection with the open sea by the gaps among seawall stones. 2）Surcharge loading directly from the seawall side is highly likely to cause the sliding of the mud surface to the inside. This paper focuses on the film-pressing process of the film-pressing ditch，surcharge loading methods，and drainage plate equipment near the seawall. It solves the problems，namely，difficult maintenance of a vacuum effect and easy sliding of the mud surface，in vacuum preloading combined with surcharge preloading under the abovementioned conditions by translation of the film-pressing ditch，multi-point uniform surcharge loading，the addition of drilling steel at the end of the equipment，replacement in the shallow area，and continuous scheme optimization. The results show that the scheme adopted is safe，reliable，and convenient for construction，and it provides a reference for similar projects.