Because the vegetative organs of sweet potato have strong regeneration ability, they can all be used as reproductive organs, so the method of asexual reproduction is adopted in production. There are several ways of asexual reproduction:

1. Potato seedling propagation. As a propagation method widely used in sweet potato production, the adventitious bud primordium lurking under the epidermis around the potato block is used to germinate long seedlings, and then the seedlings are cut in the field or in the nursery for propagation, and then the seedlings are cut in the field from the nursery.

2. Propagation of stems and vines. Cutting spring potato seedlings into autumn and winter seeds or autumn potato seedlings to raise seedlings, and then cutting them into fields after wintering, which is widely used in warm winter areas in southern South China. This method has a wide range of operations, saves labor and land, and is more economical. If you can choose seedlings carefully, it may not be worse than seedbed seedlings. However, if field seedlings are planted every year, the varieties will gradually deteriorate, the deformation of potatoes will be small, the rate of small potatoes will increase and the yield will decrease. Therefore, it is necessary to raise seedlings with seed potatoes and renew them after 2 ~ 3 years.

3. The method of raising seedlings with potato tips in winter in East Sichuan is similar to that in South China. Because of the cold winter in this area, it is necessary to use hotbeds or cold bed membranes to keep Miao Di warm, so that potato seedlings can survive the winter safely.