COPD, or Chronic Obstructive Pulmonary Disease, or Chronic Obstructive Pulmonary Disease, is a common, preventable and treatable disease characterized by persistent airflow limitation. The main cause of the development of COPD is long-term exposure to harmful particles or gases, with smoking being the most common. Symptoms include chronic cough, sputum, dyspnea, accompanied by decreased activity tolerance. The results of pulmonary function tests are important in the diagnosis of chronic obstructive pulmonary disease (COPD). Pulmonary function tests to determine persistent airflow limitation is one of the requirements for the diagnosis of chronic obstructive pulmonary disease (COPD). Treatment of chronic obstructive pulmonary disease mainly consists of exhorting the patient to quit smoking, while tiotropium bromide, an anticholinergic, can be used to dilate the airways, and aminoglutethimide hydrochloride or N-acetylcysteine can be used to resolve sputum. If the patient’s cough is accompanied by increased sputum volume and purulent sputum, antibiotics such as cefazoxime, cefuroxime, and levofloxacin may be used empirically to aggressively fight infection. If the patient is suspected or diagnosed with chronic obstructive pulmonary disease, it is recommended to go to a regular hospital, improve the examination, clarify the diagnosis, and standardize the treatment under the guidance of the doctor.