The wave transmission coefficient through double immersed vertical barriers with holes of high-piled wharf is studied through the physical model experiment in wave flume under irregular wave action.By comparison of experimental results with different theoretical calculation methods of wave transmission coefficients,the calculation method of wave transmission coefficient in the Code of Design and Construction of Breakwaters turns out to be not suitable for high-piled wharf with double immersed vertical barriers with holes.The results of Kriebel formula are in good agreement with experimental results.On the basis of Kriebel formula,the paper proposes a semi-empirical formula of wave transmission coefficient under certain wave conditions,which may serve as a reference for the engineering practice under similar conditions.