In this paper,a new bridge-type grab ship unloader is introduced,and its working principle and overall layout are explained.Different from the current commonly used grab ship unloader,the new bridge-type grab ship unloader adopts the vergence movement compensation mechanism with double trolleys,and the grab mechanism is equipped with a standard reducer,which can realize the function of movement and operation of the grab trolley.With good operating performance and comprehensive performance,the ship unloader has certain application and popularization value.