Nanfeng tangerine（Citrus reticulata cv. Kinokuni） trees were pruned by long handle circular sawing machine and hedge shear in summer to investigate the effects of pruning methods on the flowering and fruit setting of autumn shoot under the different cut in Nanfeng tangerine.The cut diameter,the number of autumn shoot under each cut,the length and basal diameter of autumn shoot,the number of flower or fruit on each autumn fruit-bearing shoot at the time of flowering and stable fruit setting in the next year was measured. The results showed that two autumn shoot with length less than 25 cm produced by two pruning methods was more than 90 percent. In mechanical pruning,the average length and basal diameter of autumn shoot had no significant difference between different cutting diameters,but were higher than those by hedge shear. The ability of flower bud formation and fruit setting on the autumn shoot had no obvious difference between different cutting diameter,however,the ability of flower bud formation were significantly lower than that in hedge shear. The ability of fruit setting on the autumn shoot had no significant difference with that in hedge shear.It is indicated that the two pruning methods can save labor usage in the summer pruning operation in Nanfeng tangerine. The effects under the different cuts in mechanical pruning was not significantly different,indicating that there is no need to take the size of shoot into account in summer pruning.It will be a fool type pruning and convenient for farmers to learn.