The bucket-based breakwater has drawn extensive concern in deep mud soil coastal projects. The stability of a single bucket with bulkheads remains a key technique. This article establishes a centrifugal model test and researches stability issues under wave loads on the basis of Lianyungang breakwater project. Wave loads are applied as quasi-static load and cyclic loads. Test results give stability performance and possible failure modes at different phases and provide the optimal design for coastal projects.