The spiral conveyor is an important component of the rotary system of the horizontal spiral centrifuge. As the only irregular rotary part， it will rotate at a high speed with the rotary system of the centrifuge. Therefore， the dynamic balance precision of the spiral conveyor will have an important impact on the service life of the whole machine. At the same time， because of the particularity of the structure of the spiral conveyor， the selection and implementation of dynamic balancing technology has some limitations and difficulties， which will affect the precision of dynamic balancing. Based on the theoretical analysis of the dynamic balancing effect of the spiral conveyor， the key factors affecting the dynamic balancing effect include the rotor structure， rotation radius and speed， etc.； and in combination with the dynamic balance test process， an optimized dynamic balance process is proposed， mainly including the dynamic balancing machine calibration， benchmarking， selection of counterweight position and the weighting method of residual unbalance， so as to reduce the residual unbalance of the spiral propeller， improve the precision of dynamic balance. Finally， through the monitoring and comparison of the temperature and vibration of the bearing seat of the centrifuge， it is proved that the process can effectively reduce the vibration of the whole centrifuge in working and improve the service life of the bearing.