The invention discloses a reflowing organic phase current stabilizing device for rare earth extracting and separating, and belongs to the technical field of rare earth extraction. The device is technically characterized by comprising a groove body, wherein an overflowing separating plate is vertically arranged in the groove body; the overflowing separating plate is matched with the groove body toform an organic phase buffering chamber and an organic phase receiving chamber; an organic phase receiving chamber outlet pipe is arranged at the bottom part of the sidewall of the organic phase receiving chamber; an organic phase inlet pipe and an organic phase outlet pipe are arranged on the sidewall of the organic phase buffering chamber; the organic phase outlet pipe is positioned at the lowerside of the upper end surface of the overflowing separating plate; the organic phase inlet pipe is positioned at the upper side of the organic phase outlet pipe; an assistant liquid feeding mechanismis arranged in the organic phase buffering chamber; a water phase cofferdam is arranged in the organic phase buffering chamber; a flow guide gap is formed in the bottom part of the water phase cofferdam; and a water phase draining mechanism is arranged in the water phase cofferdam. The device is simple in structure, convenient, and capable of automatically adjusting to keep the organic phase liquid level surface within a certain range; and the device is used for rare earth extracting and separating.