Infants spit up like a fountain, if it is occasional, vomit after the child’s mental condition is good, generally fine, without special treatment. If the vomiting is frequent and jet-like, it suggests that there may be encephalitis, acute gastroenteritis, intestinal obstruction and other diseases, which must be taken seriously by the parents and seek medical attention in a timely manner. Infant stomach development is not yet perfect, horizontal position, cardia tension is not enough, so a little bit of improper feeding, the baby may appear to spit up, but the number of spit up less, the baby’s general condition is good, more without special treatment. If the baby vomits in a jet, accompanied by fever, impaired consciousness, or even convulsions, it suggests the possibility of encephalitis. If the vomiting worsens progressively, or even if there is no weight gain or weight loss, gastrointestinal diseases such as congenital pyloric hypertrophy should be considered. If the baby vomiting accompanied by diarrhea, consider the possibility of gastroenteritis, at this time should be timely pediatric consultation, clear cause, timely treatment. In conclusion, the 1-year-old baby spit up like a fountain, more frequent, it is recommended to timely pediatric consultation, clear cause, take targeted treatment.