2. Pruning of biennial fruit trees: according to the requirements of cultivating free spindle-shaped trees, the main branches and auxiliary branches (temporary fruiting branches) are selected. Its method: Choose a branch from the trunk 8 cm upward every 15-2 cm, and arrange the branches in an empty space, with the distance between the upper and lower parallel branches on the same side above 15px. The central trunk is cut at the semi-full bud in the middle and upper part of the current branch. The competing branches on the extension heads of the middle trunk, main branch and auxiliary branch are all thinned and kept uniaxial extension. For the missing branches, bud cutting and branch filling will be carried out before germination in next spring.