Daijiazhou reach is one of the key navigation-obstructiing waterways in the middle reach of the Yangtze River.After the implementation of the first-stage project，the navigation condition was improved.However，the right edge of Daijiazhou is retreated due to bank failure，which affects the effect of the first-phase project and the construction of the consequent project.Also，the favorable tendency of navigation condition tends to the adverse direction.The design scheme of the protection project is proposed on the basis of geological compositions of the right edge of Daijiazhou，and the structure’s stability is also checked.The present work enhances the understanding of such kind projects.