The difference between the treatment group and the roxithromycin group was significant in MVV,FVC, FEV_(0.3),FEF_(25-75) and peak expiratory flow(PEF),especially in 30 days.

• 中药组MVV、FVC、FEV0.；3、FEF25-75及峰流速(PEF)与罗红霉素组比较有显著差异；差异主要在30 d给药组。