A research,which aims at the TSHD issues of complicated working conditions,big hopper,great dredging depth,accurate and highly efficient controllability and fine sailing performance,is conducted in the aspect of hull shape,serialized drag-head,high-efficiency dredging pump,pump for drag-head boom,as well as the control system.Several methods are adopted such as theoretical research,large-scale model experiments,test on dredgers,etc.,which solve the bottleneck problems that limit the technical domestication of the jumbo TSHD.Based on the above-mentioned achievement,2 jumbo TSHDs are designed and built,and applied to several key projects of port and waterway,which achieved remarkable social and economic benefit.