Sweet potato generally refers to sweet potato and millet. There are round, oval or spindle-shaped tuberous roots in the underground part, and the stems are horizontal or rising, occasionally twisted and multi-branched. The shape and color of leaves often vary with varieties, usually with wide oval shape, different petioles, axillary cymes, ovoid or oblate capsules, 1-4 seeds, generally 2 seeds, and no seeds. Sweet potato is native to South America and the big and small Antilles, and is widely planted in tropical and subtropical areas all over the world, and also in most parts of China.

Sweet potato is one of the nicknames of bean potatoes, also known as sweet potato and sweet potato, but it refers to the cold potato of leguminous plants with a wider cultivation range. Sweet potato contains a lot of sugar, protein, various vitamins and minerals, carotene and vitamin C.