The invention provides an air blowing and cooling system for hot cutting pelleting, comprising a blower, a vortex separator, an air blowing pipe, a first crushing device and a first vibration sieve, wherein the air blowing pipe is used for connecting the blower and the vortex separator; and the first crushing device is connected with the vortex separator, and the first vibration sieve is connected with the first crushing device. The first vibration sieve comprises a vibrating device, a sieving net and a fan, wherein the vibrating device is arranged on a fixed frame; the sieving net is arranged on the vibrating device; and the fan is fixed on a fan frame, and the fan is aligned to the sieving net. The first crushing device comprises a driving device, a machine shell and a crushing rotating shaft, wherein the driving device is fixed on the frame; the machine shell is provided with a material inlet and a material outlet; and the crushing rotating shaft is arranged in the machine shell; the crushing rotating shaft is connected with the driving device through a transmission mechanism; and the crushing rotating shaft is provided with a plurality of crushing bars or crushing plates. The air blowing and cooling system for hot cutting pelleting in the invention is low in fault rate, excellent in material dispersing and cooling effects, low in working noise and little in pollution to the material.