There are many reasons why 3-year-old babies have poor digestive function, such as dietary structure disorders, intestinal flora disorders, etc. Common treatments such as adjusting dietary structure, medication, exercise, etc., but due to the causes of poor digestive function are different, so the treatment approach is also different. 1. Dietary structure disorder: parents should pay attention to the baby’s diet, the baby can’t eat too much indigestible food such as rice cake, can’t eat too much cold and hard food such as sashimi, and eat more vegetables and fruits, grains, etc. After a period of time, the baby’s diet should be adjusted, and the baby’s intestinal flora should be treated with medication and exercise. After a period of time to adjust the diet structure, the baby’s poor digestion may slowly improve. 2. intestinal flora disorders: baby intestinal flora disorders, will lead to poor digestion baby dyspepsia, constipation, etc., go to the hospital for examination and follow the doctor’s instructions to take the regulation of bacterial flora medicine, such as probiotics (such as bacillus subtilis bacillus granules) and so on. Let the baby do more exercise to improve the baby resistance, enhance intestinal movement, enhance the baby’s digestive function. 3-year-old baby poor digestive function, parents must take the child to the hospital in time to check, to avoid poor digestive function, resulting in the child to absorb nutrients reduced, which in turn affects the child’s growth and development.