Riprap and stone pillow are widely used in inland waterway regulation engineering,but the traditional structure is not sufficient against scouring in reaches with deep water and high velocity where the flow regime is complex.In this work,a new large wire mesh pebble bag structure is proposed to make up for the deficiency.A mechanical model is put forward to analyze the drift distance and stability and the structure’s size is studied.This structure is utilized in Zhijiang-Jiangkou waterway project and is proven effective.