Patients coughing green sputum is a common clinical symptom, which may be caused by the following aspects: 1, due to a serious infection of the respiratory tract, usually caused by purulent inflammation of the trachea or bronchi, or possibly a purulent infection of the lungs; 2, caused by infection of the respiratory system with Pseudomonas aeruginosa, usually when the patient’s immunity is low, resulting in the patient coughing Green sputum; 3. Chinese medicine believes that patients coughing green sputum is caused by wind-heat colds, or it may be caused by wind-cold colds that turn into heat. When the patient coughs green sputum, sputum culture should be done in time, and sensitive antibiotics should be selected for treatment according to the culture results.