This paper investigates the impact factors of permeable pile structure (including wave steepness,the relative immersed depth of the piled baffle and openings) using the physical model experiment method,and gives the influential law of various factors on the transmission coefficient.The experimental result indicates that the relative immersed depth of the piled baffle and wave steepness have a negative correlation with the transmission coefficient.The impact of baffle openings for the transmission coefficient is relatively small,but it can effectively reduce the wave forces.Comparing the experimental result with various wave transmission coefficients’ theoretical formula and empirical formula given by the specification,the Wiegel formula matches well with the result got in this study,so it can be used for reference for the design.