after the seedlings are planted, they should be lightly pruned to promote more branches, which is beneficial to the formation. Before the winter solstice and early spring every year, the plants should be trimmed properly, and the dense branches, overgrown branches, diseased branches and weak branches should be thinned, so as to keep the branches evenly distributed into a spherical shape, and be careful not to have gaps. For Berberis purpurea planted in groups as flower beds, when pruning, the plants in the center should be slightly higher, and the plants at the edges should be lower to enhance the three-dimensional sense of the flower beds. Plants planted too densely should be sheared once every 3 ~ 5 years to achieve the purpose of rejuvenation.