Blueberry pruning and tree controlling method and pruning device thereof

The invention relates to the technical field of blueberry planting, and discloses a blueberry pruning and tree controlling method. The blueberry pruning and tree controlling method comprises the following steps that S1, blueberry trees are pruned from June 15 to July 31 every year after blueberry picking is completed; S2, young sprouts of the blueberry trees in the horizontal direction, the vertical direction and the current year are pruned, wherein branches higher than 1.5 m are cut off in the vertical direction, in the horizontal direction, the distance between the edges of the two adjacent blueberry trees located in the same column and the middle position between the two blueberry trees is larger than 5 cm, the distance between the edges of the two adjacent columns and the middle position between the two columns is larger than 25 cm, new shoots which are 5cm away from the base part and have the diameter of more than 0.5 cm from the current-year new shoots are selected, pruned, and reserved 8-10cm stumps af