钱塘江海塘,作为保障东南地区一方安危的堤防工程,“历来与防河、治运并列为我国三大水利工程”。南宋时期,海潮渐有改趋北大亹的情形,北岸坍塌时有发生,海塘兴筑即不断载诸史籍。为防御海潮侵袭,元代地方政府多次酝酿修建石塘。明代以后,北岸工程较前代显著增多。其中,不仅作为防御重点的海盐地区率先在北岸修筑石塘,而且在治水实践中,塘型结构不断得到改进。本文以明代钱塘江北岸海塘工程为研究对 Qiantang River seawall, as one of the safeguards in the southeast area of ​​the dike project, “always and anti-river, governor and tied for China’s three major water conservancy projects ”. During the Southern Song Dynasty, the trend of the North Sea was gradually swept away by the tide, while the collapse of the North Shore took place occasionally. In order to prevent the invasion of the tide, the Yuan Dynasty local government repeatedly brewed to build Shitang. After the Ming Dynasty, the north bank project significantly increased compared with the previous generation. Among them, not only is the Haiyan area, which is the key point of defense, the first stone pond built in the north bank, but also the pond structure has been continuously improved in the practice of water control. In this paper, the northern coast of the Qiantang River in the Ming Dynasty seawall project for the study