Felt and other materials that are easy to penetrate and do not nest roots are used as containers, and the light substrate with strong water holding capacity, ventilation and nutrient transfer ability is used as the seedling substrate. The roots of plants grown in the harmless tree planting bag will not penetrate downward. A small part of the fibrous roots on the side can be easily cut off with a cutting tool, and then they can be transplanted. Since 90% of the roots of plants grow in tree planting bags for a long time, they will not be affected by the outside world, so they are suitable for transplantation in different seasons.