Abstract: The coast plain in Zhejiang province has subsided Since 1960s. Along with the groundwater exploited constantly, the land subsidence caused a series of harms such as the tide disaster and the waterlogging disaster aggravated ，the city drainage capacity weakened, the river navigable capacity declined，and the farmlands submerged perennially. It may affect national economy sustaining development. According to the dynamic monitoring values of land subsidence and groundwater level and the research results, the history, the status and the rule of land subsidence are summarized. And the advice on prevention and treatment measures of land subsidence was brought forward.