The toe of the river bank slope is fixed with a stone cage net. While stabilizing the toe of the slope, this material will not affect the interaction ability of the water body, which is beneficial to the drainage of the entire slope. The fixed foot structure of the stone cage has the characteristics of flexibility, water permeability and integrity, and the gaps between the stones can facilitate the growth of underwater microorganisms, which is of great help in purifying water quality. The slope protection adopts GeoGro's geocell. The cell is a geocell with holes, the size is 15-80-1.2, the height is 15cm, the plate thickness is 1.2mm, and the cell welding distance is 80cm. The geocell of this size can reach 400mm×400mm×150mm (length×width×height) after fully unfolding, and the construction is simple. The top of the bank adopts 30cm×30cm C20 concrete pressure top to further enhance the stability of the bank slope.