Aucuparin (2,6-dimethoxy-4-phenylphenol) is a plant antibiotic with anti-inflammatory activity. Aucuparin inhibited pulmonary fibrosis in mouse models induced by bleomycin (BLM). ABTS and FRAP showed clear scavenging activity. Aucuparin inhibited superoxide production of human neutrophils induced by fmlp, and its IC50 was 17.0μM.