In order to solidify engineering effect of the first phrase project of Daijiazhou section fairway regulation and prevent the trend towards unfavorable conditions of the plane shape of the straight channel, so as to create a condition for the overall implementation of the master plan, it is necessary to implement the bankprotection works of the right Daijiazhou island edge. This paper analyzes the bank caving conditions and evolution characteristics of the right Daijiazhou island edge, studies the location and length of bank protection, and determines the principle and goal of the protection works. According to the comparison of water surface profile, flow rate field, flow velocity near the shore, diversion ratio and so on based on the physical model test, it determines the implementation plan of the works.