There is no fixed value for what the average life expectancy of patients with moderate chronic obstructive pulmonary disease is. Active treatment under the guidance of a medical professional can improve the prognosis and prolong life expectancy. Chronic Obstructive Pulmonary Disease (COPD), short for Chronic Obstructive Pulmonary Disease, is a kind of dyspnea disease caused by airflow limitation, mostly related to chronic bronchitis, infection, smoking, dust inhalation, chemical gas inhalation, etc. According to the severity of the disease, it is generally categorized into mild, moderate, severe, and very severe. The lung function of patients with moderate chronic obstructive pulmonary disease (COPD) is generally between 50% and 80% of that of the healthy population, and there are individual differences and no fixed value for the life expectancy, so active treatment can help to prolong the life expectancy of patients and improve the quality of life. Attention to timely detachment from adverse environmental influences, oxygen therapy, anti-infective treatment and other comprehensive treatment, timely vaccination, to reduce the emergence of respiratory infections, can reduce the risk of acute exacerbation, the patient’s life expectancy is generally longer. If patients with moderate chronic obstructive pulmonary disease (COPD) do not receive standardized and effective treatment during the acute exacerbation of the disease, the disease may progressively aggravate, and lung function may continue to decline, which may seriously lead to exhalation failure and endanger the life of the patient. For patients with moderate chronic obstructive pulmonary disease, standardized treatment under the guidance of professional physicians can effectively alleviate the disease, improve the prognosis and prolong the survival time.