板栗树的整修剪技术与其栽植密度密切相关。近几年，我市板栗的栽植密度多为３m×４m，树形多为自然开心形。我们试验的自然开心形具有树体成形早，树冠扩展快，结果早，产量高，结果部位不外移等特点。主干高８０cm（此高度便于树上、地下管理），不留中干，全树主枝五六个，? Chestnut tree renovation cutting technology and its planting density are closely related. In recent years, the planting density of chestnut in our city is mostly 3m × 4m, the tree shape is mostly natural and happy. The happy nature of our experiment was characterized by early tree formation, rapid crown expansion, early result, high yield, and no shift in the result site. Main high 80cm (this height is easy to tree, underground management), do not stay in the dry, the whole tree main branch five or six,?