The west breakwater behind Lianyungang Qitai port’s 100 000-ton bulk berth is formed on the basis of the original breakwater by blasting riprap construction process. Restricted by the formation conditions, the lower part of the breakwater is the silt layer which needs to be reinforced. Based on the comparative analysis of different reinforcement processing programs, we determine the final scheme which can not only reduce the project investment, but also meet the requirements of both construction and stability during construction.