Baby diarrhea is a group of diseases caused by multiple pathogens and factors, characterized by an increase in the number of stools and changes in stool properties. Pediatric diarrhea disease occurs mostly in infants and children under 3 years of age, with a high incidence from 6 months to 2 years of age, and is one of the main causes of malnutrition and impaired growth and development in children. Baby diarrhea treatment principles: adjust the diet, prevent and correct dehydration, rational use of drugs, enhance care, and prevent complications. 1. Dietary treatment: Mildly breastfed babies continue to nurse, appropriately limit the number of nursing sessions or shorten the duration of each nursing session, and suspend complementary foods; artificially fed children can be fed with equal amounts of rice soup or diluted milk or other milk substitutes, and gradually overtake to a normal diet from rice soup, porridge, noodles, etc. For lactose intolerant children, add lactase to the diet or remove lactose from the diet. For allergic diarrhea, switch to hydrolyzed milk powder or amino acid milk powder if protein allergy is considered. During the diarrhea, continue to eat and give the baby a normal diet appropriate to its age, as far as possible, do not “fasting”, fasting can lead to prolonged symptoms and nutritional loss. 2, symptomatic treatment (1) anti-diarrhea: ① Montmorillonite: shorten the course of diarrhea, reduce the number and amount of diarrhea defecation, improve the cure rate. Orally, for children <1 year old: 3g/d, divided into 3 times; for children >1 year old, 3g/d, 3 times a day. ②Cadotril: shorten the duration of acute watery diarrhea in children and control diarrheal symptoms. It is suitable for children from 3 months old to 10 years old. The most commonly used dose for children is 1.5mg/kg each time, 3 times/day, as an adjunctive therapeutic application of oral rehydration salts (ORS), taken before meals, for 5d or until recovery, and should not be used for too long. (2) bloating: due to diarrhea, intestinal bacterial decomposition of sugar gas production, available anal canal exhaust, if caused by potassium deficiency, can correct hypokalemia, severe intestinal infection microcirculatory disorders available phentolamine, m-hydroxylamine (Alamine). (3) vomiting: mild can be self-healing with the improvement of the disease, heavy can be oral multi-phenidone (morpholine), etc. 3, fluid therapy: correction of water-electrolyte disorders and acid-base imbalance (1) oral method: for mild dehydration or vomiting is not heavy. The amount of rehydration is calculated as 100 ml/day per kg of body weight and divided into several doses. (2) Intravenous rehydration method: for moderate and severe dehydration. 4.Micro-ecological therapy: By restoring the micro-ecological balance of human intestinal tract, it can achieve the purpose of treating intestinal diseases. 5.Zinc supplementation therapy: WHO recommends oral supplementation of zinc for children with diarrhea while continuing oral rehydration salt treatment, which can enhance immune function and prevent recurrence.