Acute gastroenteritis requires different dietary adjustments at different times. In the early stage, when the condition is serious, fasting is needed; in less serious condition, fluids can be eaten; in the improvement period, fluids or semi-fluids can be eaten; in the recovery period, warm and soft foods can be eaten. 1. Initial stage: when the condition is serious, such as severe vomiting, resulting in inability to eat need to be temporarily fasting; if the patient’s condition is general, you can eat fluids, such as congee, noodle soup, etc., appropriate amount of supplemental water, electrolytes, to prevent dehydration and electrolyte imbalance, and can be appropriate for the abdomen to relieve the discomfort of hot compresses. 2. Improvement period: During this period, the patient’s abdominal pain, vomiting and other symptoms are relieved, and the patient can eat some fluids or semi-fluids easily digestible food, such as congee, noodle soup, vegetable puree, etc., and should not drink milk and sugary food, in order to avoid producing a lot of gas and causing bloating, which will aggravate the condition. 3. Recovery period: During the recovery period, the general condition of the patient is close to normal, but still need to pay attention to diet to stabilize good gastrointestinal function, can eat warm, soft food, such as noodles, fish, eggs, cabbage, etc.; after the disappearance of discomfort symptoms can be eaten normally, but should avoid cold, spicy and other stimulating food.