The invention relates to an automatic ocean garbage recovery system which comprises a water suction pump, a water suction pipe, a garbage bin fixing base and a garbage bin. A water outlet is providedwith a sealing lid hinged to the bottom of the garbage bin. A spiral spring is arranged on the periphery of a centre. The garbage bin fixing base is provided with a buoyancy device, and the garbage bin is disposed inside the garbage bin fixing base. The upper end of the spiral spring abuts against the bottom of the garbage bin. A water inlet of the water suction pump is connected with one end of the water suction pipe, and the other end of the water suction pipe is connected with the water outlet of the garbage bin fixing base through a water suction hose. In the whole running process of the automatic ocean garbage recovery system, the garbage bin fixing base is kept in a negative pressure state all the time, and garbage sucked into the garbage bin cannot float to the upper portion of thegarbage bin or flow out of the garbage bin; the sealing lid is removed by means of the centre, water sucked into the garbage bin can be drained in the ascending process of the garbage bin, the garbagedeposits at the bottom of the garbage bin, and thus the garbage bin can collect more garbage.