Chronic Obstructive Pulmonary Disease (COPD), abbreviated as chronic obstructive pulmonary disease (COPD), which is often referred to as chronic bronchitis and emphysema by our common people, is a common disease that can be prevented and controlled, and due to its slow and progressive development, it seriously affects the patients’ ability to work and quality of life. After the acute exacerbation of chronic obstructive pulmonary disease (COPD), although the clinical symptoms are relieved, the lung function continues to deteriorate, and various cardiopulmonary complications gradually arise. History: ① Smoking history: long-term history of heavy smoking; ② occupational or environmental exposure to harmful substances: long-term exposure to dust, smoke, harmful particles or harmful gases; ③ age of onset and season of prevalence: onset of disease after middle age, symptoms occur in the fall and winter cold season. Symptoms: ① chronic cough: the first cough is intermittent, heavier in the morning, and then morning and evening or the whole day are coughing; ② cough sputum: coughing usually cough a small amount of white mucous sputum, some patients in the early morning more, combined with an increase in sputum infection, often purulent sputum; ③ shortness of breath or dyspnea: the early only in the labor of the time, and then gradually aggravated, so that the daily activities and even at rest, also feel short of breath. Examination and diagnosis: When there are similar symptoms, this disease should be suspected, and the specific tests to be done are lung function, chest CT, arterial blood gas analysis, etc. Prevention: ① Smoking cessation is an important measure to prevent chronic obstructive pulmonary disease; ② Influenza vaccine, Streptococcus pneumoniae vaccine, bacterial lysates, BCG polysaccharide ribonucleic acid, etc. may be beneficial to prevent recurrent infections in patients with chronic obstructive pulmonary disease; ③ Strengthening physical exercise, strengthening the physical fitness, and improving the immunity of the body; and ④ Timely treatment to avoid damage to the lung function. The purpose of treatment is: ① to reduce symptoms and prevent disease progression; ② to relieve or prevent the decline of lung function; ③ to improve mobility and quality of life; ④ to reduce the death rate. Treatment means: ① oxygen therapy and ventilator treatment; ② application of bronchodilator drugs and cough and phlegm drugs to relieve symptoms of shortness of breath and chest tightness; ③ removal of causative factors, such as active anti-infection and so on.