Tree pods are fast-growing species. Their bark and seeds can be used as medicine, and their economic value is high. The production practice in recent years has proved that the use of root cutting method for the propagation of Toona sinensis is fast and the survival rate is high, which is a shortcut to the development of Toona sinensis. The technical points are as follows: Seed collection and processing. It is advisable to collect roots every year from April to May. The roots of saplings are preferred, and the roots of a robust mother tree can also be used. After the root is excavated, choose a root with a diameter of 1.5-2 cm. Cut it into a root section about 10-15 cm long with a pruning shear. The big head (above) is cut into planes, and the small head (below) is cut into bevels. In order to enlarge the contact surface after cutting, it is easier to take root. Site preparation to make a bed. Nursery should choose land with fertile soil, convenient drainage, and good feelings. It is not necessary to apply organic fertilizer or inorganic fertilizer before soil preparation, so as not to cause root rot. Deeply plough and level the ground, remove debris, break up large pieces of soil, try to make the soil finely crushed, and then grow 5 that is 5 meters wide and 1 meter wide. Plugging method. Firstly measure the distance in the ground with a measuring rope, with a row spacing of 40 cm. Open a 6-8 cm deep ditch along the line. Incline the roots with 15 cm of plant spacing and then cover the soil from both sides. The top of the roots should be exposed. 2 cm long. Plug in management. After the seedlings are all germinated, ditch the ridges, and then pour a water until the seedling height 10-20 centimeters and then pour a water, combined with watering lightly applied some ammonia fertilizer, favorable urging seedlings, weeds should be promptly removed . In order to prevent the occurrence of root rot, it is necessary to control the pouring of large amounts of water and spray lime water once every half month or so. If the disease has already occurred, it can be sprayed with 0.5%-2.5% ferrous sulfate solution to prevent and control, and then spray water to cleanse the seedlings. The effect is better. In sporadic disease, the diseased plants can be uprooted and burned, and then the soil can be disinfected.