Ornamental trees cultivated in gardens, whether trees or shrubs, can generally be cultivated into trees by pruning. A standard tree must first have an obvious trunk, the height should be above 1 m, and there should be a central branch in the center of the crown, and its vertex should be located at the highest point of the crown, so that other branches and lateral branches at all levels can be evenly distributed around the central branch, and the hierarchy should be clear and the affiliation should be correct. When pruning, for some large ornamental trees which are tree species themselves, as long as the tillers and small lateral branches sprouting on the trunk are often cut off, the branches that are too dense in the crown and the cross branches that interfere with each other are thinned out, and then the new lateral branches are cut off reasonably every year according to the pruning principles and basic methods mentioned above to prevent the crown from being hollow and overgrown with weeds, it is easy to meet people's requirements, and it is not necessary to prune them very carefully.