Bronchial infections and coughs are usually bacterial infections. Commonly used clinical antibiotics are penicillins, cephalosporins, fluoroquinolones, and macrolide antibiotics. Penicillins include penicillin V potassium and amoxicillin; cephalosporins include cefradine capsules, cefuroxime and cefprozil; fluoroquinolone antibiotics mainly include ofloxacin, levofloxacin and moxifloxacin tablets; macrolide antibiotics include azithromycin, roxithromycin and erythromycin amber. These antibiotics can be used separately according to the specific situation of the infection. If it is mycoplasma infection, erythromycin class is preferred, and if it is bacterial infection, penicillin, cephalosporin and fluoroquinolones are chosen, all of which have good effect. Therefore, in addition to antibiotic treatment, chest CT should also be given to clarify whether the bronchial infection is simple or combined with other underlying diseases, such as diabetes, bronchiectasis, pulmonary fibrosis, etc., so that antibiotics can be used in a targeted manner.