Sweet potato water generally refers to the use of sweet potatoes and sugar mixed in a piece, after simmering made of a food; but it does not have any special effects and functions, only a certain nutritional value. Sweet potato sugar water main material has sweet potato and sugar. Sugar nutrients are mainly carbohydrates (disaccharide), the content of up to 99.9%, can provide energy for the body. The nutritional value of sweet potato is rich in dietary fiber (content of 1.5%), carbohydrates (content of 25%), certain minerals, vitamins and other nutrients; sweet potato intake to a certain extent can help to increase the feeling of satiety. Among other things, dietary fiber helps maintain normal intestinal function. However, the content of this effective substance in food is limited and cannot achieve the purpose of treating diseases. It is recommended to consume sweet potato syrup in moderation so as not to aggravate the burden on the gastrointestinal tract and cause indigestion. And diabetic patients need to eat sweet potato water with caution.