Chronic obstructive pulmonary disease (COPD) is the most common chronic respiratory disease in the elderly, and refers to a chronic inflammatory disease of the airways characterized by incomplete reversibility of airflow limitation due to various causes. Chronic obstructive pulmonary disease leads to death, mostly due to the occurrence of pulmonary encephalopathy or respiratory failure. The symptoms before death are mainly chest tightness, shortness of breath, increased dyspnea, and finally unsustainable, leading to severe hypoxia or carbon dioxide retention, causing a drowsy state and gradually manifesting as lethargy, coma, impaired consciousness, and unresponsiveness to external stimuli. If not reversed in time, the heart gradually slows down due to severe hypoxia until the heartbeat stops and breathing stops. There are also some patients with pulmonary heart disease due to slow obstructive pulmonary disease, which manifests as acute heart failure at the end of life, with extreme respiratory distress, in a telangiectatic position, with profuse sweating all over the body, which is not controlled and relieved in time, followed by coma and cardiac respiratory arrest, and ultimately life-threatening.