This study examines oblique wave motion over multiple submerged porous bars in front of a vertical wall.Based on linear potential theory,an analytical solution for the present problem is developed using matched eigenfunction expansions.A complex dispersion relation is adopted to describe the wave elevation and energy dissipation over submerged porous bars.In the analytical solution,no limitations on the bar number,bar size,and spacing between adjacent bars are set.The convergence of the analytical solution is satisfactory,and the correctness of the analytical solution is confirmed by an independently developed multi-domain BEM(boundary element method) solution.Numerical examples are presented to examine the reflection and transmission coefficients of porous bars,C_R and C_T,respectively,for engineering applications.The calculation results show that when the sum of widths for all the porous bars is fixed,increasing the bar number can significantly improve the sheltering function of the bars.Increasing the bar height can cause more wave energy dissipation and lower C_R and C_T.The spacing between adjacent bars and the spacing between the last bar and the vertical wall are the key parameters affecting C_R and C_T.The proposed analytical method may be used to analyze the hydrodynamic performance of submerged porous bars in preliminary engineering designs. This study examines oblique wave motion over multiple submerged porous bars in front of a vertical wall. Based on linear potential theory, an analytical solution for the present problem is developed using matched eigenfunction expansions. A complex dispersion relation is adopted to describe the wave elevation and energy dissipation over submerged porous bars. In the analytical solution, no limitations on the bar number, bar size, and spacing between adjacent bars are set. The convergence of the analytical solution is satisfactory, and the correctness of the analytical solution is confirmed by an separately developed multi-domain BEM (boundary element method) solution. Numerical examples are presented to examine the reflection and transmission coefficients of porous bars, C_R and C_T, respectively, for engineering applications. Calculation results show that when the sum of widths for all the porous bars is fixed, increasing the bar number can significantly improve the sheltering function of the bars.Increasing the bar height can cause more wave energy dissipation and lower C_R and C_T.The spacing between adjacent bars and the spacing between the last bar and the vertical wall are the key parameters affecting C_R and C_T.The proposed analytical method may be used to analyze the hydrodynamic performance of submerged porous bars in preliminary engineering designs.