In order to maintain a more favorable pattern of beach slot at present in Kou’an straight reach of the Yangtze River, Manyusha shoal head protection engineering will be implemented, thus the maximum scour depth surrounding the project need to be studied to determine the width of pressure stone in edge and the key protection parts. The flume series experiments with the scale of 1∶100 and 1∶200 are used to study the local scour depth around beach protection project. The result shows that the depth of maximum local scour will be 6.0 m, which can be applied to the engineering design.