The invention relates to a conveying device for lubricating oil of a blender reducer, which can solve the problems that the lubricating oil in the blender reducer is hard to exchange and potential safety hazard is present in the process of carrying the lubricating oil, and the like. The conveying device comprises a slurry agitation tank, a lubricating oil tank of the blender reducer, a discharge valve, a bypass-valve, an oil pipeline and an oil pipeline pump, wherein the lubricating oil tank of the blender reducer is connected with the discharge valve; after the bypass-valve is connected in parallel with the oil pipeline pump, one end of the oil pipeline pump is connected with the lubricating oil tank of the blender reducer through the discharge valve, and the other end of the oil pipeline pump is connected with the oil pipeline; and the oil pipeline can be directly grounded.