Infants who are bottle-fed with formula milk are prone to choking, possibly due to the incorrect method of brewing formula milk, resulting in a large amount of air entering the milk, after the infant drinks the milk with a large amount of air present, the gas in the stomach needs to be eliminated from the body through the oesophagus, which is highly likely to cause overflow, and when the milk flows into the trachea it can cause choking; in addition feeding the infant in the wrong position, the infant is unable to swallow the milk smoothly, which can also easily cause choking. When bottle feeding, keep the infant’s body in a sloping position with the teat below the bottom of the bottle to ensure that no air enters the bottle, and the teat hole should be appropriately sized so that the milk flows out in a drip shape; excluding feeding reasons, it may also be due to the infant’s own illnesses such as gastroesophageal reflux, gastric torsion and other gastrointestinal diseases, colds, laryngitis, bronchitis and other respiratory diseases causing choking after formula feeding.