The wind load distribution on all-weather working large-span dock is studied by rigidity model man metric experiment in the wind tunnel. The effects of high water level, low water level, occupied and unoccupied on characteristics of wind pressure distribution are discussed. The results show that the effects of internal pressure on wind load, which is the significant change to the wind direction, is unnegligible; The wind suction is enforced because of positive internal pressure induced by local openings in some wind directions; The wind loads are different in interference cases, and the strongest wind load appears in case of unoccupied in the low water level.