Suctioning reduces respiratory secretions, reduces bronchial irritation, and helps to relieve coughing. Sputum aspiration is the use of a sputum aspirator to aspirate the patient’s respiratory secretions, to remove respiratory secretions, to ensure that the respiratory tract is clear and with the help of sputum aspiration can be retained in the deep secretions for pathogenetic examination, which can help in the diagnosis. For some patients with severe respiratory diseases, such as severe pneumonia, the patient’s lungs and respiratory tract, there may be more sputum, the patient himself is unable to cough up sputum, unable to cough up sputum on their own. After sputum aspiration, the respiratory secretions are removed, which can ensure the smoothness of the respiratory tract, and at the same time reduce the irritation of sputum on the bronchial tubes and reduce the coughing response. Discharging the sputum reduces the re-contamination of the lungs with sputum and helps in the treatment and recovery of lung infections. When the pneumonia recovers, the sputum will decrease and the cough will improve. Meanwhile, for some infections with unclear pathogens, sputum aspiration can be used to retain deep secretions for pathogenetic examination, which can help guide diagnosis and treatment. Sputum suction on the treatment of cough, there is a certain role, it is recommended to consult a doctor in a timely manner, under the guidance of a professional doctor, standardized treatment.