After adjustment of the sea use policy，the traditional contiguous scheme with caisson structure + rear backfilling/dredger filling makes it difficult to obtain approval for sea use.Combined with engineering examples，through the comparison of theoretical calculation and physical model test，this paper optimizes the structure force，structure，and construction and proposes the caisson pier + composite slab structure scheme，which has the characteristics of shallow bedrock surface，high wave，and large load.The scheme has been successfully applied in Lanshan Port Area of Rizhao Port.The operation of the wharf is in good condition，and good economic benefits have been achieved，which provides a reference for the design and construction of the wharf under similar conditions.