When the baby has diarrhea, the supplemental food should be semi-liquid, liquid food, and at the same time need to stop adding new supplemental food. When the baby has diarrhea, the intestinal function is dysfunctional, digestion and absorption ability is weakened, and the activity of various digestive enzymes decreases. At this time the whole digestive system is relatively fragile, if a large number of protein, fat-rich food, easy to lead to increased gastrointestinal burden, and even lead to diarrhea becomes more serious. At this time you need to try to eat some cooking up more soft, fluid, semi-fluid food to reduce the baby’s burden, such as soft noodles, vegetable porridge and so on. At the same time, the baby can get enough carbohydrates and energy from complementary foods. You should stop adding new complementary foods when your baby has diarrhea; new complementary foods are a challenge to the gastrointestinal tract and need some time to adapt. If your baby’s diarrhea is more pronounced and accompanied by other discomforts, it is recommended that you seek medical attention to find out the cause of the diarrhea, and if necessary, actively use medication under the guidance of your doctor.