Castanea mollissima is a light-loving tree species, with thick peripheral branches and numerous fruits. Reasonable tree shape and pruning can improve lighting conditions, concentrate nutrition and improve fertilizer efficiency. Dwarf trees are easy to manage, reduce pests and diseases, overcome years, increase yield per plant and improve chestnut fruit quality. The significance of chestnut pruning, in a word: "strong trees have high and stable yield and high quality, saving fertilizer, medicine and increasing efficiency."

The functions of shaping and pruning chestnut trees are as follows: ① To construct a reasonable branch skeleton in the young tree stage, lay a structural foundation for high yield, accelerate crown expansion, increase the amount of branches and leaves, and enter the fruiting period as soon as possible. (2) The control results partially move outward, reducing the invalid volume of the crown and prolonging the period of obtaining the highest economic yield. ③ Adjust the contradiction between growth and fruiting to prevent the formation of big and small years; Improve canopy ventilation and light transmission conditions, increase effective photosynthetic area, and improve fruit yield and quality. (4) Regulating the tree potential and the branching potential of each part of the crown, so as to make the tree develop in a balanced way and each part grow and bear fruit in a balanced way. ⑤ Old trees are renewed to restore production capacity. ⑥ Reduce pests and diseases and improve the efficiency of other management measures.