Abstract: According to the importance of the pallet in the chain type feeder system for the backfill mining, with the calculation formula of the impact load provided with the energy method, a finite element program was applied to study on the fatigue damage of the pallet after the impact of the backfill material under the different sp aces and different dropping velocities and to predict the fatigue life of the pallet.Finally the dangerous part of the pallet was analyzed and the fatigue law of the pallet af fected by the impact of the backfill material was obtained.The study results showed that with the space between the pallets increased, the fatigue damage of the pallet would be higher and when the space between pallets was 5 m, the fatigue life would meet the mining service life of the mine.The higher of the pallet dropping velocity, t he fatigue damage of the pallets could be reduced.In consideration of the strength, stability and transportation efficiency of the pallet, the dropping velocity of 1.52 .5 m/ s would be suitable.