Gastrointestinal flu is mainly caused by coxsackievirus, norovirus and other infections, with nausea, vomiting, diarrhea, abdominal pain and other digestive symptoms as the main manifestations, usually within 1-7 days can gradually relieve and stop diarrhea. The treatment of gastrointestinal flu is based on rest to reduce physical exertion and strengthen the body’s power to fight with the disease, and also to give the stomach and intestines sufficient rest. Those with vomiting and diarrhea need to take oral salt rehydration solution. Severe cases need to go to the hospital general internal medicine department for intravenous rehydration symptomatic treatment to maintain the water-electrolyte balance in the body; those with fever need to carry out physical cooling or medication to lower the temperature. With the above effective treatment, diarrhea can usually be gradually relieved in 1-2 days and cured in about 7 days. Usually, we should pay attention to drinking more water, washing hands regularly, paying attention to dietary hygiene, not eating frozen food, and eating more fresh vegetables and fruits and easily digestible food.