Gao Qian's natural heart shape and sparse trunk shape can be used for pruning Sophora japonica. Natural happiness has 3 ~ 5 main branches on the trunk, and each main branch has 2 ~ 3 side branches; The whole tree with sparse trunk has 5 ~ 7 main branches, which are planted on the central trunk in 2 ~ 3 layers. Wipe your head when transplanting Sophora japonica seedlings, and set the dry height at 3 ~ 3.5m；; If there are good branches near the height of the stem, 3 ~ 5 branches can be left as the main branches for trunk cutting, and a large number of branches can germinate in that year. When pruning in winter, 3 ~ 5 branches with vigorous growth, suitable direction, suitable angle and ideal position are selected as the main branches, and 60 ~ 80 cm short sections are left in the main branches, and outward buds are left at the cut to expand the crown; The remaining branches shall be thinned reasonably, and the whorled branches, clustered branches, weak branches, diseased branches, over-dense branches and dead branches shall be thinned. It should be thinner. In the second year, the first lateral branch was cultivated at a distance of about 50 ~ 60 cm from the main branch, and the first lateral branch was required to be in the same direction as the main branch. In winter, the main branches and side branches are shortened so that the growth of the side branches does not exceed that of the main branches; Other branches on the main branch are sparse, and the sparse branches are slowly released as auxiliary branches. In the third year, the extension branches of the main branch and the side branch will continue to be cut short, and at the same time, the second side branch will be cut short on the other side of each main branch. After 4 ~ 5 years of pruning, the trunk is quite tall and thick. When the ratio of crown height is about 1∶2, pruning can be stopped, and if it is allowed to grow naturally, a tall tree can be formed.