The utility model relates to a feeding device of a granulator. wherein the feeding system is arranged on the side edge of a main machine of the granulator and is arranged at an included angle relativeto the main machine; the feeding system comprises a support which is installed on the same horizontal plane with the main machine. A discharging channel and a hopper arranged on the discharging channel and connected with a feeding port of the discharging channel are installed above the support, a feeding screw is arranged in the discharging channel, a discharging port of the discharging channel is located at the position close to the upper portion of a feeding port of the main machine, and a discharging cover is connected between the discharging port of the discharging channel and the feedingport of the main machine. The feeding system is located on one side of the main machine, the feeding height can be reduced, the probability that hot air exhausted from the feeding port of the main machine is wrapped by mixed materials again when the feeding section of the main machine is heated is reduced to the maximum extent, and therefore the bridging phenomenon is generated in the feeding port of the main machine and the discharging cover, and smooth production is guaranteed.