Method for producing granular compound fertilizer through coating and pelletizing

The invention relates to a method for producing a granular compound fertilizer through coating and pelletizing. The method comprises the following steps: producing granule cores from a part of a compound fertilizer raw material, or by taking a granule raw material of a compound fertilizer as granule cores, crushing the part of the compound fertilizer raw material to be less than 100 meshes, completely putting the granule cores into a coating machine in an amount of one-batch production, uniformly putting a powder raw material into the coating machine for multiple times, dispersing the powder raw material to the surfaces of the granule cores under the dispersion action of a rolling bed in the coating machine when the powder raw material is added each time, adding aids to enable the powder raw material to be solidly stuck to the surfaces of the granule cores, after one cycle, sequentially adding the powder raw material and the aids, and repeating the process to increase granules in a generally accordant granule