The more common causes of constant diarrhea in babies are gastroenteritis or lactose intolerance. The treatment principles for babies with diarrhea all the time are diet adjustment, prevention and correction of dehydration, reasonable medication, enhanced care, and prevention of complications. 1, diet therapy: during acute diarrheal disease, resume eating as soon as possible after the start of oral rehydration or intravenous rehydration, and give an age-matched diet. Vomiting severe cases fasting 6 – 8h, to continue feeding after the condition improves. (1) Infants and young children: continue breastfeeding, formula feeders can choose to apply low-lactose or lactose-free formula. (2) Older children: no dietary restrictions. (3) Do not consume foods with high concentrations of simple sugars, such as carbonated beverages, jellies, canned juices, desserts and other sugary drinks; foods with high fat content should also be avoided if possible. 2, nutritional treatment: (1) glycogenic diarrhea: lactose intolerance is the most common. Treatment is based on a de-dieted diet, and de- (or low) lactose formula can be used. (2) allergic diarrhea: when diarrhea does not improve with the application of de-lactose feeding, the possibility of protein allergy should be considered, and allergy to milk protein can be given hydrolyzed amino acid formula or deeply hydrolyzed protein formula nutritional powder feeding. 3, control of infection: (1) viral enteritis and diarrhea caused by non-bacteria, diet and supportive therapy, not long-term abuse of antibiotics to avoid dysbiosis. (2) bacteria and antibiotic-associated diarrhea, under the guidance of the doctor to apply antibiotics for treatment. 4, symptomatic treatment: (1) antidiarrheal: ① montelukast: shorten the course of diarrhea, reduce the number and amount of diarrheal bowel movements, and improve the cure rate. (2) abscisicadotril: shorten the course of acute watery diarrhea in children and control the symptoms of diarrhea. It is suitable for children from 3 months of age to 10 years old, and is applied as an adjunctive treatment to oral rehydration salts, taken before meals, for 5d or until recovery, and should not be used for too long. (2) bloating: due to diarrhea, intestinal bacteria 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). 5, microecological preparations (1) acute diarrheal disease: the use of probiotics can shorten the duration of diarrhea, reduce hospitalization time recommended the use of Saccharomyces boulardii, Bifidobacterium trisporus, Bifidobacterium quadruplex viable tablets, Bacillus subtilis dibacterium particles, Clostridium perfringens viable bulk, Clostridium typhimurium dibacterium bulk, Bacillus licheniformis viable particles, compound lactic acid bacteria capsules, Bifidobacterium lactis triplex viable tablets and Bifidobacterium trisporus enteric coated capsules. (2) Extended and chronic diarrheal diseases: the use of probiotics in combination with comprehensive treatment can reduce symptoms and shorten the course of the disease. We recommend the use of Saccharomyces boulardii, Bifidobacterium trisporus, Bifidobacterium trisporus enteric soluble capsule, Bifidobacterium quadruplex, Bacillus subtilis dibacterium granules, Clostridium typhimurium live bulk, Bifidobacterium lactis triplex live tablet and Lactobacillus complex capsule. 6. Prevention and correction of dehydration: Diarrhea causes a large amount of water and electrolyte loss in the body. Therefore, as soon as diarrhea begins, the child should be given sufficient oral fluids and continue to feed the child, especially infant breastfeeding, to prevent dehydration. The following methods can be used: (1) Oral rehydration salts (ORS): after each diarrhea, give 50~100ml orally under 2 years old, 100~200ml for 2~10 years old, and as much as you can drink for those older than 10 years old. It can also be given at 40~60ml/kg, immediately after the start of diarrhea. (2) Rice soup with salt solution: 500ml of rice soup + 1.75g of fine salt or 25g of fried rice flour + 1.75g of fine salt + 500ml of water boiled for 2~3 minutes. The dosage is 20~40ml/kg, served in 4 hours, and given orally anytime afterwards, as much as you can drink. (3) sugar and salt water: boiled water 500ml + cane sugar 10g + fine salt 1.75g. dosage is the same as rice soup with salt solution. In addition, the baby often fed those bottles to pay attention to disinfection, the usual diet to pay attention to hygiene, but also pay attention to hand washing, to see if the baby has the habit of eating hands, and pay attention to it.