This paper presents the on-the-spot investigation and prototype observation data analysis for a new kind of flexible mattress with concrete blocks ballast which is widely used in the Yangtze River. Through the model test, the paper also analyzes the most easily damaged parts and the main failure reasons of the buildings and measures to prevent damage and relevant restoration measures. Taking into account the principle that the body of the central bar should maintain the stability of the shoals and channels, this paper proposes the research approach to determine the width of beach protection belts and the space between them. At the same time, it proposes the measures to optimize the beach protection engineering structures.