Plastic pruning in winter is easy to make branches accumulate nutrients and form flower buds. When pruning, the central trunk should always grow vigorously. When it reaches a certain height, measures such as flattening, bending and pressing the fruit crown can be taken to weaken its growth, promote the germination of its short branches, and lay the foundation for the transformation from vegetative growth to reproductive growth. Young trees are mainly shaped, while big trees mainly adjust the balance of underground part, aboveground part and crown part on the premise of maintaining high-yield tree shape, so that their growth results are coordinated, ventilation and light transmission are good, which is conducive to high and stable yield.