In the production process of bioferfertilizer, the quality index of fertilizer requires that the water content is less than 14%, and it needs to be dried. Therefore, drying is an indispensable important process in the production process of organic fertilizer production line, which directly affects the output, quality and energy consumption, and the reasonable selection of organic fertilizer dryer is very important. In order to avoid the death of effective live bacteria due to high temperature in the drying process, the temperature of the hot air in contact with the material is different according to the water content of the material, it is recommended to control the temperature of the hot air in stages, which can improve the thermal efficiency and avoid the death of effective live bacteria. Combined with these characteristics, the selection of organic fertilizer dryer suitable for low temperature and low moisture drying, can control the temperature of hot air into the section, to ensure that the temperature of the material is not higher than the specified temperature during the whole drying process, the tail can increase the cooling section, after drying immediately cooling, to play a multi-purpose function. The front part of the organic fertilizer dryer is provided with a secondary granulation area, in which the material can achieve secondary granulation. Then the material is raised through the lifting plate to fully dry, and the hot humid air is extracted through the exhaust fan through the pipe at the end of the dryer, and then settled into the settling chamber. After secondary dust removal treatment, the tail gas is discharged into the atmosphere through the chimney