Bronchiectasis, generally referred to as diffuse panbronchiolitis, is a non-infectious inflammatory lesion of the fine bronchi of unknown origin, which usually manifests as chronic cough and sputum, and may progress gradually, leading to chest tightness, dyspnea, and respiratory failure. Diffuse panbronchiolitis mainly involves the whole layer of the bronchial wall, due to inflammation, can cause coughing symptoms, localized exudate can form sputum to be coughed up, the early stage of the disease may only have cough, cough sputum symptoms. Diffuse panfine bronchiolitis disease progress can lead to extensive lung lesions, which can lead to decreased pulmonary ventilation, affecting lung capacity, resulting in chest tightness, dyspnea symptoms, can be complicated by respiratory failure; the disease may also form bronchiectasis, easy to combine with the infection, which can also lead to coughing up sputum, chest tightness, dyspnea symptoms worsened. When diffuse panfine bronchitis is suspected, high-resolution CT of the chest is feasible for investigation. If the disease is diagnosed, standardized drug treatment under the guidance of a doctor and close observation are required.