Based on the design of 400 000 DWT ore quay in Dongjiakou port area, this paper analyzes the phenomenon and reasons of broken cables of some line type quays. By physical and numerical model tests on 400 000 DWT and 150 000 DWT ships, this paper presents a new type of mooring style by increasing 30 m for the cross cable, by which, the forces of the cross cable decreases more than 30%, while the bow stern cable increases slightly, the pour cable increases and the pour cable decreases within 15%. Using the new mooring style, the force on each cable becomes more uniform and reasonable, and the cable breakage is avoided.