Sloping breakwater is a common type of wave protection structure with simple structure，strong adaptability to foundation and mature construction technology，and is widely used in coastal engineering.Conventional sloping breakwater design is usually combined with structural safety，engineering cost and other needs，according to the requirements of the code to select the appropriate wave prevention standards，determine the corresponding wave run-up and wave overtopping discharge，and finally select the appropriate section structure.In addition to the above factors，the design of breakwaters with driving function，especially those projects greatly affected by wind and waves，should take driving safety and landscape requirements into consideration.In this thesis，combined with the use of practical projects and the results of different physical model test schemes，the design scheme of adding a wide platform on the outer side of existing structure is put forward to effectively reduce the amount of wave overtopping discharge.It has been tested in practice and meets the requirements of use.