Material returning and granulating structure of conveying belt

The utility model provides a feed-back granulation structure with a conveying belt, and belongs to the technical field of fertilizer granulation. The granulating device comprises a granulating box, supporting legs, a granulating mechanism and a heating and blowing mechanism, the heating and blowing mechanism comprises a heating ring, and the outer side wall of the heating ring is connected with a plurality of rotating blades. Under the action of a heating and blowing mechanism, wind power is generated according to the rotating action of telescopic blades and rotating blades, so that heat in the granulation box is fully circulated, the heat is fully circulated and heated in a granule outlet pipe, and correspondingly, when the granule outlet pipe carries out granule outlet work, the difference between the temperature in the granule outlet pipe and the temperature in the granulation box is reduced; and therefore, the phenomenon that the particle outlet pipe is blocked due to the fact that the temperature in the