Old trees in fruit trees have poor nutrition, high consumption and generally old branches, so pruning should focus on renewal and rejuvenation, and adhere to the principle that the results are subject to renewal. Specifically, we should pay attention to the following two points.

1. Give priority to control and combine promotion with control: The number of branches and leaves and the number of flowers and fruits of aged trees should be strictly controlled, so as to reduce ineffective consumption and mutual shading and improve the nutritional status of various organs. At the same time of control, try to make the branches grow behind the branches as preparatory branches when they are retracted and updated.

2. Give priority to light and heavy, combining light and heavy: When pruning old trees every year, prune some perennial branches and branches in a planned way until the whole crown can be renewed. At the same time of retraction and regeneration, the newly issued branches should be cut gently and released slowly to promote them to blossom and bear fruit as soon as possible and reduce the yield loss in tree regeneration.