Before the cause is clear, changes in stool characteristics and an increase in the number of bowel movements are collectively referred to as diarrheal disease. Diarrheal disease is a group of diseases caused by multiple causes and factors. It is one of the diseases with the highest incidence in childhood and a global public health problem. At least 1 billion people suffer from diarrhea every year. According to a survey by the World Health Organization, about 10,000 people die from diarrhea every day. In my country, diarrheal disease is also a common disease among children. According to relevant data, the annual incidence of diarrheal disease in children under 5 years old in my country is 201%, with an average of 2.01 cases per child per year and a mortality rate of 0.51%. Therefore, the prevention and treatment of diarrheal disease in children is very important. The most important virus that causes viral enteritis is rotavirus, followed by adenovirus, Norwalk virus, enterovirus, coronavirus, small round virus, astrovirus, etc., but far less than rotavirus. This section focuses on enteritis caused by rotavirus.