The invention discloses a splayed groove corrugation roll comprising an external roller; an inner roller is movably installed inside the external roller; a first rotating shaft is movably installed ata position, close to the middle, of the external surface of one side of the external roller; a second rotating shaft is movably installed at a position, close to the middle, of the external surface of the other side of the external roller; an air inlet pipe is movably installed inside the first rotating shaft; an upper end and a lower end of the air inlet pipe, close to the internal roller side,are provided with first gas guide holes; one side, close to the second rotating shaft, of the internal roller is provided with a second gas guide hole; the air inlet pipe is movably provided with a siphon tube therein, and an opening suction nozzle is movably installed at a lower end of the siphon tube; a roller interlayer is provided between the external roller and the internal roller. The invention has a series of structures to evenly heat the corrugating roller during the use of the device so that the corrugating roller is not easy to be deformed, and it is convenient for replacing the tooth groove, without replacing the drum, and the condensed water inside the corrugating roller is completely discharged, and the use process is optimized.