Eosinophilic bronchitis belongs to the common respiratory allergic diseases, the main clinical manifestations are nasal congestion, runny nose, sneezing, dry cough, little sputum, chest tightness, shortness of breath, even with urticaria and other skin allergic diseases. In eosinophilic bronchitis, routine blood tests suggest a significant increase in eosinophils, induced sputum can show a significant increase in induced sputum cells, and a negative bronchial excitation test can exclude cough-inducing variant asthma. Eosinophilic bronchial manifestations are symptoms of clinical allergy, and these symptoms need to be given hormone therapy, mainly oral prednisone, dexamethasone, nebulized inhalation glucocorticoid, budesonide suspension, and in severe cases, intravenous infusion of methylprednisolone can be given to improve clinical symptoms by anti-inflammatory, anti-allergic, wheezing and cough suppression. Exhaled breath nitric oxide testing can indicate chronic airway inflammation and increased airway reactivity. Therefore, the clinical symptoms of eosinophilic bronchitis are mainly similar to those of allergic asthma, which is recurrent and can develop into typical bronchial asthma.