Nebulization is a common treatment for respiratory diseases, mainly used for the following diseases: 1, upper respiratory tract infections: tracheal and bronchial infections, including tuberculosis infection; 2, airway obstructive diseases: such as bronchial asthma and chronic obstructive pulmonary disease, nebulization treatment is an important means of remission of these two diseases in the acute exacerbation period, nebulization treatment drugs are mainly taken to short-acting diastolic bronchial and surface hormones 3, lung infection: especially lung infections in combination with structural changes in the lung, such as bronchiectasis combined with lung infection, can use bronchodilators; 4, bronchial anesthesia: usually used when using bronchoscopy; 5, the establishment of an artificial airway: for example, before the tracheal intubation can be done properly nebulization treatment, so that the patient’s airway conditions are more suitable for the establishment of an artificial airway .