To solve the problem that the design technical standard of the deep rubble-bedding foundation for gravity quay is not systematically studied.The stress state,design methods and theories of gravity quay with the deep rubble-bedding foundation have been studied.Based on the introduction for a typical gravity quay with a deep rubble-bedding foundation,this paper used theory analysis,numerical simulation and design calculation methods to study on the optimization design of the deep rubble-bedding foundation for gravity quay.The stress distribution laws of the deep rubble-bedding foundation is summarized,an improved algorithm is proposed for the stress of the deep rubble-bedding foundation,the upper and lower limit values of the bottom width of foundation trench excavation and the cross-section of riprap body in foundation trench,the identification criteria of the deep rubble-bedding foundation are proposed.The results show that the stress of the deep rubble-bedding is not within the slope line of 1:1.5 on the front side of the front toe,and with the deepening of the depth,the the stress distribution shows a trend of increasing in the front and decreasing in the back,similar in the front and back,and decreasing in the front and increasing in the back.The improved algorithm is much better than the standard method,the discrimination standard of the deep rubble-bedding foundation is defined.The research conclusion enriches the design theory of gravity quay,which provides reference and guidance for similar engineering designs.