Oxygen in patients with chronic obstructive pulmonary disease is beneficial, and continuous low-flow oxygenation at 2-3 l/min is recommended. Long-term home oxygen therapy is recommended for patients with fingertip oxygen less than or equal to 88% and arterial blood gas analysis oxygen less than 55 mmHg, with a daily oxygen intake of about 10-15 hours. Excessive oxygen flow tends to lead to carbon dioxide retention, so special care is needed. Oxygen inhalation can improve the state of lack of oxygen, which can make the oxygen supply to the organs of patients with slow obstructive pulmonary disease effectively replenished. Meanwhile, patients with slow obstructive pulmonary disease must quit smoking, stay away from occupational dust exposure and prevent respiratory tract infections, which are all necessary for patients with slow obstructive pulmonary disease. If individuals have poor health, they can have pneumonia vaccine and flu vaccine in advance to prevent the occurrence of respiratory infections.