Gastrointestinal bleeding is most commonly seen in the upper gastrointestinal tract and care is critical, mainly due to peptic ulcers, ruptured esophagogastric fundic varices and other causes. In the acute phase, intravenous access should be established, kept warm, and blood pressure and heart rate changes should be monitored. Intravenous supplementation with colloids, crystals, suspended red blood cells, and central venipuncture placement if necessary, can be performed to facilitate blood and fluid transfusion. Advise the patient to adopt a high semi-recumbent position to prevent acute gastrointestinal hemorrhage leading to vomiting of blood and secondary asphyxia, which in severe cases can lead to respiratory failure and death. It is also important to monitor the flow of gastrointestinal decompression and, if necessary, to inject thrombin or norepinephrine through the gastric tube, which can relieve vascular bleeding to some extent.