Disclosed is a water-oil junction high-separation-rate environmentally-friendly device, belonging to the field of water-oil separation. In the water-oil junction high-separation-rate environmentally-friendly device, a non-uniform sedimentation floating film (5) is arranged; at a water-oil boundary, the non-uniform sedimentation floating film (5) can gradually sink from left to right to be attached to the water surface due to water absorption by water absorption threads (52), such that oil at the water-oil boundary is discharged to a semi-transparent separation box (2), oil above the boundary is concentrated, then the separation speed and separation degree of the oil at the water-oil boundary from a right separation pipe (42) are increased, and the water-oil separation efficiency at the water-oil boundary is improved; and, under the action of expansion water absorption fluff (6) and a bottom pendant (7), the water absorption speed and the water absorption amount of the water absorption threads (52) can be increased, such that the speed of the non-uniform sedimentation floating film (5) at the water-oil boundary sinking from left to right and being attached to the water surface can be effectively increased, the speed of the oil on the water-oil boundary being discharged to the right is higher, and the water-oil separation efficiency is further improved.
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