The top branches of pear trees, as well as the top branches, often have strong growth advantages because of the role of endogenous hormones and the characteristics of preferential supply of nutrients. This growth advantage is called the top advantage. The top advantage is the pear tree crown, so it can continue to develop into outer space. In the process of plastic pruning, the top part of the pruned branches will be lowered, while the top part of the branches that are not pruned or have a light pruning amount will be relatively raised. In this way, the apical dominance phenomenon will shift: the branch growth of the convex part will be relatively enhanced, and the branch growth of the lower part will be relatively weakened. For example, if two branches with similar growth intensity and angle are cut with different severity, the light and short cut top will be higher than the short cut top. In this way, the branches on the short cut will be more lush than those on the short cut. This reaction is not exactly the same as that of light, short and weak branches under normal circumstances. This is because pruning can promote the growth of local branches, not only on the pruned branches, but also on the branches with the highest position nearby. Therefore, in the process of pruning, when the main branch is pruned again, the growth potential of the main branch will be enhanced, and the growth potential of the middle branch will also be enhanced; This function can also be used when dealing with competitive branches of backbone branches. That is, as long as the extension branches of the backbone branches are moderately lightly cut to make the cutting height higher than that of the competitive branches, the top advantage of the extension branches of the backbone branches can be maintained; In order to coordinate the growth of main branches and lateral branches, this characteristic can also be used. Some pear varieties with low branching ability are prone to unbalanced phenomena of too strong main branches and too weak side branches under the action of apical dominance. In order to prevent this imbalance, the opening angle of the lateral branches can be slightly larger than that of the main branches, and the horizontal angle with the main branches can be kept at about 40 ~ 45 degrees; The cutting length of the lateral branch extension can be basically the same as or slightly shorter than that of the main branch extension, and the vertical height of the top of the main branch and the lateral branch should not be too different; In order to prevent the back of the main branch from being too long, the pruning amount of the branches on both sides should be properly controlled to avoid excessive pruning or excessive weight of the branches on both sides, and to prevent the growth advantage from transferring to the back of the main branch, resulting in the back of the main branch being too long.