Fall diarrhea is a common and frequent disease in infants and young children within two years of age. Fall diarrhea in infants and young children is mainly caused by rotavirus infection, with diarrhea as the main clinical feature, and can cause malnutrition, growth and development disorders and other adverse consequences in infants and young children. Diarrhea stool performance is mainly the number of times, more volume, more water, stool color is yellow watery or egg flower-like with a small amount of mucus, no fishy smell. It is often accompanied by fever, symptoms of respiratory infection, followed by vomiting and diarrhea within 1-3 days. It can also be summarized into three main features: cold, vomiting, and diarrhea. Pediatric autumn diarrhea is generally caused by four etiologies: (1) immature digestive function in children, poor activity of gastric acid and enzymes, poor tolerance of food, and excessive addition of fat and starch can cause gastrointestinal dysfunction. (2) Pediatric immune system function is poorly developed, poor regulation function, pathogenic bacteria with contaminated food into the body caused by diarrhea. (3) Viral infection, infant and child milk utensils are not disinfected or disinfected incompletely. Rotavirus enters the body through the mouth and causes infection. (4) Infection caused by cold and flu leads to diarrhea. Now that we understand the causes, how can we prevent autumn diarrhea to avoid the adverse effects on children? I have probably summarized several prevention methods: (1) For breastfeeding infants and young children, you must adhere to breastfeeding, because breast milk is rich in immune factors, containing a variety of digestive enzymes and antibodies, suitable for infants and young children gastrointestinal tract digestion and absorption, but also to improve the immune function of children. Therefore, weaning in autumn should be avoided to prevent sudden changes in diet structure caused by the addition of complementary foods after weaning, which may cause gastrointestinal tract dysfunction, resulting in pediatric diarrhea. (2) Since rotavirus infection is often caused by fecal-oral transmission, it is important to prevent children from getting the disease from the mouth, and to pay attention to the disinfection of food utensils by boiling them after each use, not by boiling water, as the temperature of boiling water gradually decreases over time, and the disinfection effect cannot be achieved at time and temperature. Breastfeeding children should pay attention to the cleanliness of the nipples, and pay attention to cleaning the nipples before each feeding. The person taking care of the child should pay attention to hand washing hygiene and not to mouth-to-mouth feeding, as normal bacteria in the mouth can also cause diarrhea in children. Also, pay attention to family hygiene such as children’s clothing, toys, etc. to give your baby a clean and comfortable environment to grow up in. (3) Pay attention to the cold, with the change of seasons, the temperature difference between morning and evening becomes larger, always increase and decrease clothing. When sweating, dry the sweat in time. (4) Pay attention to cross-infection, go to public places less often, and isolate children with diarrhea when they are around. Studies have shown that effective interventions can greatly reduce the incidence of pediatric fall diarrhea. I hope that my few interventions can play a preventive role for your baby’s health.