The utility model discloses a drying system of glucosamine preparation usefulness, including spray drying tower, injection spray pipe, intake stack, fan, heating device, cyclone and dust remover, havespiral cooling tube in the intermediate layer of spray drying tower, the medial surface of spray drying tower inside wall still is fixed with ring portion and lower ring portion, is connected with aplurality of round annular column -shaped pipes between the upper and lower ring portion, and upward ring portion has the cavity, and the cavity passes through third pipeline and first pipeline intercommunication, has first valve on the third pipeline, and the top end opening that every circle annular column -shaped managed all communicates with the cavity, and the lateral wall of circle annular column -shaped pipe has a plurality of gas outlet through hole. The utility model discloses a drying system, spray drying tower can antiseized walls, and drying effect is good.