Potatoes contain carbohydrates, vitamin C and a variety of minerals and other nutrients. Potato mainly contains more water, about 79.8%, containing 17.2% carbohydrates, protein 2.0%, rich in vitamin C27.0mg/100g, and contains carotene, vitamins and calcium, phosphorus, potassium, selenium, a variety of trace elements. Moderate consumption of potatoes can replenish water, provide energy and provide essential vitamins and trace elements, help to maintain normal physiological functions. As potatoes contain 334KJ/100g of energy, they can be used as one of the staple foods, and the consumption of cereals should be reduced accordingly when eating potatoes. Potatoes are prone to mold, should be ventilated and preserved, moldy potatoes contain more lobelia, should not be consumed.