The treatment of pediatric bronchiectasis is as follows: 1. search for the cause: sputum specimens are taken through bronchoscopy to clarify the diagnosis, which is mostly seen in clinical Pseudomonas aeruginosa infection; 2. medication: special use grade antibacterial drugs such as Tylenol can be used, and if Tylenol is not effective and with parental consent, quinolones such as ciprofloxacin can be used, which is more effective and economical; 3. bronchial lavage: 2-3 times of lavage to remove bacteria and secretions from the bronchi to ensure the best efficacy of the drugs.