1, put it in the fresh-keeping belt, make a hole of 2 cm, and put it in the refrigerator for 3-5 degrees. It can be kept for a week.

2, vacuumizing and storing; The sweet potato leaves are placed in a fresh-keeping belt, evacuated, sealed, and placed in a refrigerator for 3-5 degrees, which can be stored for a long time.

3. Nitrogen filling preservation method; Put the sweet potato leaves in the fresh-keeping belt, inject 99% nitrogen, seal, and put them in the refrigerator for 3-5 degrees, which can be stored for a long time. The effect is better.