Objective To evaluate the effect of treating lung cancer through bronchial artery medication(drug treatment).Method Total 16 patients with lung cancer treated by bronchial artery infusion(BAI),and the changes of the tumor diameter,alleviation of clinical symptoms and complications following infusion were observed.Results The diameter of tumor shrunk to be smaller after BAI,most of the clinical symptoms were also alleviated and no major complication occured.Conclusion The effect and the safety are good after treating lung cancer with BAI.