Patients with chronic obstructive pulmonary disease (COPD) are considered to have COPD type II respiratory failure if the partial pressure of oxygen is less than 60mmHg, accompanied by partial pressure of carbon dioxide of more than 50mmHg when they do a blood gas analysis at rest and when they inhale room air; the main solutions for COPD patients are to treat the primary disease, inhalation of oxygen, and active treatment, and other treatments. 1. Treatment for primary disease: chronic type II respiratory failure caused by chronic obstructive pulmonary disease can be treated with inhalation of bronchodilators such as umebronium bromide and vilanterol. 2. Oxygen therapy and ventilator therapy: COPD combined with type II respiratory failure may be secondary to pulmonary heart disease, long-term inhalation of low-flow oxygen can reduce the above complications, and severe respiratory failure may require the use of non-invasive ventilator treatment. 3. Other treatments: for example, when the combination of pulmonary heart disease is accompanied by significant edema, diuretics such as furosemide and spironolactone may be needed for treatment. Therefore, COPD combined with type II respiratory failure should be treated individually under the guidance of a doctor.