The paper investigated the stability of the implemented deep-channel bottom protection project,and put forward the idea of optimizing the edge-protecting structures at the terminal end of the bottom protection zone work in deep channel based on the analysis on destruction causes.Further,taking Qixingtai deep-channel bottom protection zone at the Jiangkou waterway in the mid reach of the Yangtze River as an example,it carried out flume experiments and studies on the edge-protecting structure at the end of bottom protection zone in deep channel and finally raised combined measures of setting rock riprap plus flexible materials and permeable frames at the edge of bottom protection zone in deep channel.