Abstract: The shield method is often used for the inflowing and draining shield tunnels in the construction of power plants.However,the soil will be considerably disturbed due to this method,and it will affect the deformation and stability of sea embankments.Meanwhile the post-construction settlements of thick soft sublayer will result in the longitudinal differential deformation.Then the interaction between the tunnels and embankments is the key problem to be solved.The inflowing and draining shield tunnel in the Datang Nengde Power Plant was taken as an example,and practical and effective measures were suggested based on the numerical analysis of the settlement of embankments and the differential deformation of the shield tunnel.Based on the analysis of monitoring data,the conclusions about the behavior of the tunnel and the recommended construction rate were proposed.These results would provid a scientific reference for the design and construction control of similar shield tunnels in practice.