To observe the clinical curative effect of method of supplementing qi, activating blood circulation and dredging collaterals by Chinese medicine plus steaming washing therapy in treating diabetic lower extremity arterial disease(DLEAD). Methods: A total of 120 patients were randomly divided into treatment group and control group, with 60 cases in each group. The treatment group was treated by method of supplementing qi, activating blood circulation and dredging collaterals by Chinese medicine plus steaming washing therapy, while the control group adopted the basic treatment plus oral-taken aspirin, intravenous infusion of safflower injection. Results: The symptoms and signs in both groups showed significant improvement before and after treatment (P<0.01), and the treatment group was significantly better than control group; the femoral artery peak systolic velocity in treatment group had improved obviously after treatment (P<0.01). The therapeutic effect of treatment group was superior to control group. Conclusion: Method of supplementing qi, activating blood circulation and dredging collaterals by Chinese medicine plus steaming washing therapy is more effective than western medicine only on DLEAD.