AECOPD is the abbreviation for acute exacerbation of chronic obstructive pulmonary disease. Chronic obstructive pulmonary disease is a disease characterized by airflow limitation that is not completely reversible and progresses progressively. It is associated with an abnormal inflammatory response of the lungs to noxious gases or particles such as smoke, primarily involving the lungs, but can also cause systemic adverse effects. The clinical manifestations of chronic obstructive pulmonary disease are mainly chronic cough, sputum, chest tightness, wheezing and dyspnea. The acute exacerbation of chronic obstructive pulmonary disease mostly occurs after cold or exposure to cold, and is more obvious in winter. The early stage of the disease can be manifested as chest tightness and shortness of breath after activity, and normal activities can not appear chest tightness and shortness of breath, but only chronic cough and sputum, and in the late stage, chest tightness and shortness of breath will appear all year round, and the chest tightness and shortness of breath will be more serious with a little activity. Therefore, COPD should be treated in time to slow down the progress of the disease, improve the lung function and delay the decline of lung function.