The utility model belongs to the field of flour product processing, and especially relates to a flour-rolling oil-coating device. The device comprises an oil supply pot and an oil coating roller, and is characterized in that: one end of an oil pipe is connected with the oil supply pot, and the other end is provided with an oil pipe plug; an oil hole is disposed on the oil pipe and at an area corresponding to a flour roller; the oil coating roller is disposed on the external surface of the area with the oil hole on the oil pipe; two ends of the oil coating roller are provided with end caps; the oil pipe is symmetrically supported by a support; the surface of the oil coating roller contacts the surface of the flour roller. The utility model has the advantages of uniform oil coating, high efficiency, safety, and reliability.