The invention discloses a thickened oil blending-light mixed tool. The thickened oil blending-light mixed tool includes an outer tube, an injection pipe, a support block, a first joint and a second joint; the first joint and the second joint are separately connected to two ends of the outer tube, the outer tube is sleeved with the injection pipe, and two ends of the injection pipe is closed; the perimeter wall, close to the first joint, of the injection pipe is provided with a thin oil inlet which is used for passing of thin oil into the injection pipe, the perimeter wall, close to one end ofthe second joint, of the injection pipe is provided with a jet hole which is an annular gap formed between an outer tube and an inner tube, and the gap allows the thickened oil to enter from the firstjoint and to flow in the direction of the second joint; the thin oil enters the injection tube from the thin oil inlet and flows in the direction of the jet hole to be ejected from the jet hole, a first-time mixing of the thin oil and the flowed thickened oil is carried out, and mixed oil enters the second joint for a second-time mixing. According to the thickened oil blending-light mixed tool, the thin oil and the thickened oil can be fully mixed, the thin oil consumption is reduced, so that the effect of reducing the energy consumption can be achieved.