The plant community and plant species distribution of the Jingjiang reach river floodplain were analyzed through the exploration,tracking,etc.The experimental model plants were selected in combined with the actual investigation,then we carried out the experimental study on the influence of different vegetation on the flow structure.The results showed that the presence of vegetation had a significant influence on the flow velocity near the bank slope,which increased the resistance of the water flow,and had better protection effect to reduce the erosion of the water.The different vegetation height and different planting density had different effects on the root erosion of vegetation.At last,field test of ecological slope protection of different vegetation was carried out in the bank protection engineering section of Zhangjiazha revetment in Zhoutianhe section with obvious ecological effect.