This paper mainly describes the innovation design of the gravity block quay wall with relieving slab combining some project cases.Since the reliving slab of existing quay is longer than usual,the increasing apron uniform load causes a greater stress backward on the top surface of the foundation bed,whose bearing capacity cannot meet the requirements of relevant codes.The transformation scheme reduces the load of relieving slab cantilever and prevents a greater stress backward through driving cast-in-place piles and casting reinforcement concrete slabs,which can provide a reference for similar quay transformation in the future.