The transfer mode of sinter directly affects its ore return rate, which has become an important factor limiting the increase of sinter production. To address the elevated return fines rate caused by conventional inclined chutes in sinter ore transportation, the traditional inclined chute was replaced with a spiral chute, and baffles were installed to reduce wear between the sinter ore and the chute baseplate. The EDEM simulation software is used to simulate the sinter sliding speed and distribution state under different spiral chute angles, different baffle heights and different baffle numbers. Through the research, the optimal spiral chute process parameters are obtained: the spiral chute spiral angle is 45° , the pitch is 14m , the number of baffles is 50, the spacing of baffles is 0.4m , and the height of the baffle is 150mm . After optimization, a certain amount of sinter can be stored between the baffles of the spiral chute, which increases the sinter sliding friction, and the sinter sliding speed is reduced from 7.11m/s to 3.63m/s , which reduces the sinter sliding impact force, thereby reducing the sinter return rate and prolonging the life of the spiral chute.