Considering the design condition at Yang River nuclear power station,the flood control dissipater is studied by the model experimentation method.The result shows that,the flood control dissipation design within the site of Yang River nuclear power station,i.e.to use the bridle path at mountain slope excavation to get the multi-level dissipation of energy,and to set up the stilling baffle outside the bridle path and permeable dike inside the bridge path as the dissipater,could obtain the satisfactory result of dissipation of energy.