The hydraulic characteristics of a square thin-wall ecological revetment structure under different porosity conditions are studied by the physical model test. The results show that the variation trend of water surface profile is basically the same under different porosity conditions. With the increase of porosity，the deceleration effect of water flow in the revetment area turns better. There is a positive correlation between turbulence intensity and porosity. The transverse distribution law of the shear stress in the front and rear sections of the revetment is basically the same，and it increases first and then decreases on the whole. The longitudinal distribution of the shear stress is smooth，and it is almost the same.