Between Jan.1990 and Mar.1994, twenty-three patients[Male:20, Female:3 with aortoilac occlusive disease had underwent reconstruction [bypass garft . Two main causes of occlusion were atherosclerosis [21 patients and chronic thromboembolism[2 patients . Indications for operation were disabling claudication in 20 patients and critical limb ischemia in 12 patients. The procedures of operation included femorofemoral[8 , axillobifemoral[6 , aorto-bifemoral[6 , axillounifemoral[2 , aortoiliac[1 bypass graft. Postoperatively one patient died for sepsis and the operative mortality was 4.3%. Various anticoagulant therapy were maintained for at least six months. The 1year, 2year, 3year and 4year patency rates of bypass graft after operation were 91.3%, 80.8%, 71.4% and 58.4% respectively.