The invention discloses a heating roller for a compound machine, which comprises an oil inlet, a first oil-dividing hole, a first oil chamber, a spiral flute, a second oil-dividing hole, an oil through pipe, a second oil chamber, a roller surface, a backflow hole, an oil return pipe and an inner pipe, wherein the roller surface and the inner pipe are fixedly connected with big choke plugs at two ends to form an enclosure space, the spiral flute is fixedly arranged in the enclosure space, the oil inlet is fixedly arranged in the big choke plug at the right end, the oil return pipe is fixedly arranged in the big choke plug at the left end, the oil inlet passes through the big choke plug at the right end to extend into the roller and to be connected with the oil-dividing holes, the oil-dividing holes are connected with the left and the right ends of the spiral flute, the middle part of the spiral flute is connected with the backflow hole which is arranged on the center shaft of the cylindrical roller surface, and the backflow hole is connected with the oil return pipe which is arranged on the big choke plug at the left end. The invention has the advantages that the roller is composed of two layers of tubes, and the hot oil can be filled in the whole space between the two tubes, which ensures that the temperature of the roller surface is uniform; and because the oil enters the roller from two ends and outflows from the middle, the defect that the temperature of one end is higher than that of the otherin the traditional roll surface is solved.