Organic fertilizer granulation device

The utility model relates to an organic fertilizer granulation device capable of returning materials, in particular to an organic fertilizer granulation device which comprises a granulation box and a screening box, the granulation box is installed on the upper surface of the screening box, a partition plate is fixedly connected to the inner wall of the granulation box, a mixing assembly is arranged on the upper surface of the granulation box, and the partition plate is fixedly connected to the inner wall of the granulation box. A lifting cylinder is installed on the left side face of the granulation box, a material returning assembly is arranged in the lifting cylinder, a servo motor b drives an auger to rotate, organic fertilizer unqualified in screening enters the lifting cylinder through a feeding pipe, and the auger rotates to drive unqualified organic fertilizer particles to be discharged into the granulation box again through a discharging pipe. The servo motor a drives the stirring paddle to rotate to