First, it is important to address the most life-threatening situations by promptly clearing the airway to prevent blood clots from gastrointestinal bleeding from blocking the bronchi, which can cause choking or asphyxiation. Additionally, it is crucial to timely replenish blood volume, as significant blood loss can directly lead to shock. While combating shock, actively identify the cause of the bleeding. Use a gastroscope for examination, and blood can be stopped under gastroscopy. If it cannot be stopped under gastroscopy, an emergency laparotomy should be performed to carry out a major gastrectomy. Postoperatively, intensive care should be strengthened, actively identifying the cause of gastric bleeding, providing symptomatic treatment, and maintaining regular dietary habits, with meals being on schedule and in fixed amounts.