Feeding circulating device of roller dryer

The utility model relates to the technical field of roller drying machines, and discloses a feeding circulating device of a roller drying machine, which comprises a movable material spraying pipe and a circulating stock bin, and the movable material spraying pipe comprises a pipe body and a base; the pipe body is used for conveying raw materials, and spraying holes are formed in the surface of the pipe body; the base comprises a panel, a rhombic flange and a bolt; a sliding groove is formed in the surface of the panel and connected with a rhombic flange, and the rhombic flange is fixed to the surface of the panel through a bolt. The circulating stock bin comprises a shallow bin, a discharge port and a discharge pipe; a roller is arranged above the shallow bin, and the bottom of the shallow bin is connected with the discharge port; the end, away from the shallow bin, of the discharging port is connected with a discharging pipe. And in the material spraying process, other materials are ensured not to be in cont