The common reasons for babies coughing and vomiting after drinking milk include physiological reasons, respiratory infections and so on. 1. Physiological reasons: infant gastrointestinal function is not perfect, small stomach capacity, stomach is horizontal, easy to physiological gastroesophageal reflux, drinking milk when eating too fast, swallowing a lot of air, overfeeding, etc. may stimulate the baby’s throat caused by coughing, choking, vomiting, etc., but the baby’s spirit, growth and development of the baby is good. 2. Respiratory tract infection: when a baby has a respiratory tract infection, accompanied by coughing, coughing up phlegm, fever, diarrhea and other symptoms, respiratory secretion stimulation triggers coughing, vomiting. The baby coughing after drinking milk vomiting, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.