The utility model provides a biotic sea float oil recovery device, which is characterized in that the biotic sea float oil recovery device imitates the seakeeping properties of a natural jellyfish with large cavities following the wave; the biotic sea float oil recovery device uses a floating body for making the cavities and a plurality of radiation-shaped flexible ducts extended from the cavities float on the sea; oil-water mixture on the sea is guided into the cavities by pipes; the oil-water mixture in the cavities is formed into eddy after being rotated by the rotation of blades on a main shaft in the cavities, which makes oil and water stressed by different strength of centrifugal force because of the proportion differences. Therefore, oil is aggregated at the central part of the eddy. The oil is sucked into the flexible oil bag under the action of liquid wheels, and water is aggregated on the bottom part of the cavities. The oil is sucked out of the cavities under action of another liquid wheel. The utility model has the advantages of reasonable design, simple structure, stable performance, high recovery efficiency of the floating oil and good seakeeping properties. The utility model is particularly suitable for recovering the floating oil on the sea under bad ocean climatic conditions.