Gastric bleeding in 32-week preterm infants may be caused by feeding intolerance. Small amount of bleeding does not require medication, while large amount of bleeding requires medication and rehydration. Due to the immaturity of the gastrointestinal tract’s secretion, digestion and absorption, dynamics, immunity and other functions, preterm infants are prone to feeding intolerance, which may be manifested by gastroesophageal reflux, vomiting, gastrointestinal bleeding, positive fecal occult blood and abdominal distension after breastfeeding. Gastrointestinal bleeding should be treated with a clear airway to avoid aspiration. Small amounts of bleeding do not require special treatment and can be gradually controlled through dietary adjustments and other measures. Severe bleeding can be stopped with drugs such as growth inhibitors after evaluation by the clinician, and rehydration or blood transfusion is needed to avoid shock if the bleeding is heavy. To prevent feeding intolerance, early microfeeding of breastmilk is advocated to promote the structural integrity of the gastrointestinal tract, to promote peristalsis and secretion of gastrointestinal hormones, to improve gastrointestinal function, and to gradually increase the amount of breastfeeding. The occurrence of gastrointestinal bleeding, need to be promptly sent to the hospital for treatment.