The most difficult point of the power plant across sea/river circulating water & taking catchment engineering shield construction craft is that excavation construction needs to cross the defense dike, which can cause partly dike subsidence without proper control. Based on the characteristics of the circulating water draining engineering from one 2 × 1 000 MW unit in a power plant in Shanghai, the subsidence control measures by the shield construction method was drawn up, which can control the subsidence of dike effectively.