Permeable breakwater with barriers is applicable to the situation of deep water and poor foundation bearing capacity.By physical model experiment,we verify the rules between both parameters of the model and wave elements and the effect of wave dissipation of double barriers permeable breakwater,which mainly studies the transmission coefficient variation rule of transmission coefficient in the range of［0.25,1.5］.The wave dissipation effect of multi-layer-barriers permeable breakwater is obviously better than the single one,and an optimal engineering design can be given.Through the research on the calculation method of the wave transmission coefficient,we obtain a new structural form by modifying the Wiegel equation and Kriebel equation which fit the double-layer-barriers permeable breakwater,providing reference for the practical engineering calculation.