The invention discloses a discharging structure of a granulator. The discharging structure of the granulator comprises two granule pressing rollers, a sealing plate, an air guiding cylinder and an air sucking cylinder, wherein the granule pressing rollers are barrel-shaped; a plurality of forming through holes are formed around the surfaces of the granule pressing rollers; the roller surfaces of the two granule pressing rollers are clung and arranged side by side; the sealing plate is fixedly arranged on one end of each granule pressing roller and used for sealing an inner cavity of the granule pressing roller; the air guiding cylinder is fixedly arranged on the other end of the granule pressing roller; the air guiding cylinder is coaxial with the granule pressing rollers; the end part of the air sucking cylinder extends into the air guiding cylinder; the outer wall of the end part of the air sucking cylinder is matched with the inner wall of the air guiding cylinder by virtue of a bearing and sealed; the air sucking cylinder is connected with a fan. According to the discharging structure of the granulator, formed granules are automatically discharged out by virtue of the design of an air sucking and discharging structure, so that the working efficiency is greatly improved, and time and cost are saved.