To address the inefficiency,pollution,and safety risks of traditional floating cranes in water transshipping bulk cargo such as coal and ore,this study explores a novel transshipment technology solution to implement the requirements of the “Yangtze River Protection” strategy.Through a comparative analysis of existing transshipment models and vessel characteristics,combined with advancements in continuous loading and unloading equipment,it is proposed that a self-unloading vessel scheme is suitable for sand and gravel transshipment.For coal and ore cargo,an innovative integrated system centered on a chain-bucket continuous unloader,ship loader,and pontoon platform has been developed.Two technical solutions are designed:Scheme 1 features a separated layout of “chain-bucket unloader + belt conveyor + fixed ship loader,” while Scheme 2 integrates unloading and loading functions into a highly compact chain-bucket combined loader-unloader.The results show that both transshipment schemes can achieve an operational efficiency of 2,000 t/h,representing a 300% increase compared to traditional floating crane transshipment(500 t/h),while also enabling zero spillage and zero dust emission during operations.Among them,Scheme 2 demonstrates superior performance in energy consumption and environmental protection due to its highly integrated equipment design.This study provides an innovative technical pathway for the green and efficient transformation of heavy bulk cargo transshipment operations.