At present, there is no authoritative literature on food acidity and alkalinity. Some elaboration on food acidity and alkalinity refers to food ash, which is the oxides of some elements left after food combustion, which is totally different from the nature of metabolites after digestion, absorption and utilization of food in the body. Potato is a nutritious food, which contains protein, carbohydrates, carotene, vitamin C, calcium, phosphorus, potassium, sodium, magnesium and other nutrients, moderate consumption can provide the body with nutrients, to a certain extent, to maintain the normal physiological function of the body. Daily diet must ensure food diversity, dietary nutrient balance, do not favoritism picky eating, so as not to lead to the body lack of nutrients.