Abstract: According to the conditions of the Sutong Bridge, such as deep water, rapid flow, erodible riverbed and pile foundation of the pylon, the sand-filled bags and protection-apron are adopted in designing the scouring protection to ensure the construction of the pile foundation, and to protect effectively the slope failure caused by the failure at the edge of the protection works of the pier and the deep variation of the riverbed. According to the local scouring around the pile foundation of the pylon, a normal movable-bed physical model test is conducted to predict the local scouring and is verified by the field measured data. Based on the field throwing test of sand-filled bags, the techniques for throwing protective materials to the erodible river-bed are solved, and the acceptance calculation model for scouring protection at the pier foundation area of the Sutong Bridge is presented.