Pruning in winter is a very important job in pear production. Pear trees of different ages have different pruning purposes and methods. The specific methods are as follows: The main purpose of pruning young trees in winter is to cultivate tree shape and expand crown quickly, so as to achieve the goal of early fruit and high yield. Generally, the long branches are cut lightly and put slowly, the straight branches are leveled, the short and medium branches are kept, and the side branches are moderately shortened. Try to use the extracted branches to expand the crown of the tree. It is generally not refined, except that the refined part is too dense. The main purpose of pruning trees in winter in full fruit season is to regulate the growth of trees, control the trees within a predetermined range, maintain ventilation and light, maintain a vigorous and stable moderate tree potential, and extend the full fruit season. For plants with vigorous tree growth, it is necessary to control vigorous growth, thinning more and cutting less, removing straight branches and retaining oblique branches. By increasing the angle of branches and leaving more flower buds, the growth of trees tends to be moderate. For plants with weak tree potential, heavy pruning should be taken to moderately cut off some strong branches and sparse weak branches; Cut off some short and medium fruit branches, sparse some flower buds, turn fruit branches into vegetative branches, increase the proportion of vegetative branches, and enhance the tree potential by strengthening vegetative growth. For plants with stable tree potential, the emphasis is on the cultivation and regeneration of fruiting branches; For pear trees with many flowers, cut off inferior flower buds, cut off axillary flower branches and adjust the ratio of fruiting branches to vegetative branches. The main purpose of pruning old trees in winter is to promote the regeneration and rejuvenation of branches, restore the tree vigor as soon as possible and prolong the fruiting life. The drooping perennial branches should be retracted, and the buds should be cut off at the retracted position, and the angle should be raised to make them grow upward and gradually strengthen, and some flower buds and sparse weak branches should be cut off. Cut it moderately, replace the backbone branches with branches that grow too vigorously, restore the tree vigor to the maximum extent, and regain high yield.