The split hopper barge is one of the key facilities that assists large dredger dredging construction.In view of the domestic research for the 4 000 m3 large-scale self-propelled bow-connection split hopper barge,this paper analyzes the functional characteristics of the barge,i.e.opening the left and right half bodies for quick mud unloading,being capable of unloading mud in shallow water area,realizing overflow of different cabin loading heights through an overflow units,carrying out the shore blowing operation by the bow blowing device,etc.,the paper proposes the key technology of this type of ship design,and solves a series of technical problems such as the ship’s splitting status stability,splitting hydraulic cylinder,as well as mud tank sealing,etc.,and grasps the core technology of the large self-propelled bow-connection split hopper barge,so as to provide reference for the design of the same kind of ship.