1, fall diarrhea is a common disease in pediatric period, mostly seen in infants and children aged 6 months-2 years, mostly occurring in the fall and winter, but there are disseminated cases in all four seasons of the year. 2, fall diarrhea caused by rotavirus, so antibiotic treatment is ineffective. 3, the onset of the disease is rapid, often accompanied by symptoms of upper whistle infection, may be accompanied by mild to moderate fever. Typical performance for the stool is egg-flake soup-like or yellow dilute watery stool, with a small amount of mucus, generally odorless, several times a day to more than a dozen stools. The child often has no obvious abdominal pain, but may have vomiting. If left untreated, it is often complicated by varying degrees of dehydration and electrolyte disorders, and can be life-threatening in severe cases. Therefore, the most frightening thing about diarrhea is not the diarrhea itself, but the dehydration and the imbalance of the body’s internal environment caused by diarrhea. 4, routine stool examination, white blood cells are occasionally seen or absent. Positive viral antigen in stool by ELISA or immunofluorescence method, or positive viral nucleic acid in stool by PCR or nucleic acid probe technique. 5, the disease is self-limiting disease, the natural course of the disease is generally 3-8 days, individual can be extended to about 10 days.