In consideration of the shortage of rock materials, difficult construction of large stones, high quarrying environmental protection requirements, the instability tendency of the armour structure at the steep reef of the breakwater root, and out-of-control project progress in Samoa Apia Port breakwater project, an innovative design is carried out for the typical sloping breakwater.A new type of sloping breakwater structure using concrete artificial blocks instead of traditional rocks is proposed, and the stability of the breakwater structure is verified through three-dimensional overall physical model test.The test results show that it is feasible that using artificial blocks instead of rocks as the underlayer, apron and toe structure in the sloping breakwater.Furthermore, based on the test phenomena and results, an optimized design of the breakwater toe grooving on the steep reef terrain is adopted, which can provide reference for the design of similar sloping breakwaters.