Oxygen intake after surgery has the benefits of increasing the partial pressure of arterial blood oxygen and oxygen saturation, promoting metabolism and so on. If the patient is under general anesthesia, the patient’s respiratory muscle function is not fully recovered after the operation, at this time, oxygen can help to relieve dyspnea and other uncomfortable symptoms, which can help to reduce the adverse effects of post-anesthesia. Postoperative oxygen can help improve blood oxygen, which can promote body metabolism and help patients recover. In addition, post-surgery oxygen may also improve liver function, kidney function is damaged, at the same time, increase the concentration of oxygen in the body is also conducive to reducing myocardial oxygen consumption, is conducive to the recovery of the patient’s condition. The specific time of post-surgical oxygen intake should be decided according to the patient’s own situation, not every patient needs oxygen intake. In addition to oxygen intake, postoperative patients need to have a regular work and rest schedule, avoid strenuous activities, and at the same time, eat a balanced diet, choose easy-to-digest food, eat more fresh fruits and vegetables, and avoid spicy and stimulating food.