The pier of floating-wharf is used in refuge harbor basin for work-boat of Yangshan deepwater port，and traditional barge-mooring can not meet its operation requirements.A new-type pontoon-mooring is creatively advanced：two 1 200 mm steel-pipes in landside and one 1 500 mm steel-pipe in seaside to constitute a stable support-system,in which,loads are evenly distributed and the structure stress is definite.The removable-flapper is installed to help the pontoon remove for dredging or maintenance.