Young walnut trees refer to trees that are under 15 years old and are in the plastic period and bear no fruit or bear initial fruit. Young trees generally grow vigorously, and the annual growth of new shoots can be as long as 30 ~ 50 cm. The main task of pruning is to cultivate reasonable and firm backbone branches and orderly distributed fruiting branches, so that the crown can form and bear fruit as soon as possible. In shaping and pruning technology, we should pay attention to the principles of light cutting, slow release and multi-branches, that is to say, the extension head of the backbone branch should be cut short at the middle and upper parts where the buds are full, so as to promote the growth of strong branches and maintain the growth advantage of the backbone branches.

When cultivating the fruiting branch group, it is necessary to keep as many branches as possible, without pruning and slowly releasing them, so as to promote the flowering and fruiting of short branches in the germination stage. In order to prevent the phenomena of "growing trees on the tree" and "fighting for the first place on the back" from interfering with the normal cultivation of backbone branches and fruiting branches, it is necessary to control and transform the upright branches on the back and the competing branches that overlap and extend on the back as soon as possible by means of pinching, pruning and pulling branches. Under the condition of not affecting the normal growth of nearby backbone branches, the interlayer auxiliary fruiting branches with large space and development space can also be promoted by coring and pruning to form multi-branched large and medium-sized fruiting branches.