The invention discloses a spray feeding system for a spray granulation tower. The system has high separation efficiency by using a centrifugal separation principle and is provided with a multi-layer array nozzle to adjust the temperature of the granulation system by spraying and vaporizing an auxiliary solvent during the spray granulation so as to ensure the quality of the spray granulation and smooth separation and conveying of asphalt residue grains. The system can be applied to the spray granulation and separation process of the asphalt residue in the heavy petroleum gradient separation process.