Low blood oxygen level after lung cancer resection can be given oxygen, ventilator-assisted ventilation, improvement of anemia and other therapeutic measures, and specific treatments need to be selected according to doctor’s prescription. Some patients after lung cancer resection surgery may have low blood oxygen level, according to the different degree of oxygen deficiency, the following treatment measures will be taken. 1. If the degree of postoperative low oxygen level is not serious, the oxygen supply can be improved by ordinary oxygen inhalation or mask oxygen inhalation, etc., so as to improve the oxygen level of blood. 2. For postoperative patients with more serious low oxygen levels, tracheal intubation or incision and ventilator-assisted ventilation are usually used to improve oxygen supply. 3. For low oxygen levels caused by anemia, drugs or blood transfusions are usually used to improve the anemia, thus increasing the oxygen level.