After successful anesthesia, the operative field was routinely disinfected and toweled. A median incision was performed, up to the glabella and down to the pubic symphysis, and the abdomen was opened layer by layer, and after exposing the abdominal cavity, the liver, spleen, and intestinal canal were explored without abnormalities. The small intestine, transverse colon, and greater omentum were pulled to the upper right with an automatic pulling hook to fully expose the retroperitoneum in front of the abdominal aorta and iliac artery, cut the retroperitoneum and adipose tissue in front of the abdominal aorta, separate the inferior mesenteric artery and left ureter, and pull them to the left side with rubber bands, respectively. The abdominal aorta under the left renal vein was incised longitudinally, about 2 cm long, and the wall of the abdominal aorta was seen to be thick, with “lime-water”-like fluid flowing out of the mid-membrane layer when incision was made, and there were more attached thrombi in the lumen, which were removed as much as possible, and a large amount of The lumen was flushed with saline; the posterior peritoneum and adipose tissue in front of the right iliac artery were cut, the common iliac artery, internal iliac artery and external iliac artery were separated, and the vascular blocking band was preset to block the common iliac artery, internal iliac artery and external iliac artery. The thick end of the “Y” artificial vessel was trimmed, and the end-lateral anastomosis between the artificial vessel (GORE TEX, 16-8 mm) and the abdominal aorta was performed with a GoreCV4 vascular fusion suture (continuous external suture), and the thin end of the right side of the “Y” artificial vessel was trimmed after completion. After bleeding (to flush out the residue and air in the abdominal aorta), an end-lateral anastomosis (continuous external suture) was performed between the artificial vessel and the iliac artery, and the suture was completed and the vessel was opened. The patient was considered to be hypercoagulated, and 20 mg of heparin was added intravenously. In the same way, the left common iliac artery, internal iliac artery and external iliac artery were isolated, and the left common iliac artery was incised and the endothelium of the beginning of the internal iliac artery was peeled off; there was no blood return, the endothelium was brittle, and the vascular condition was poor. After trimming the artificial vessel and blocking the femoral artery, an end-lateral anastomosis (continuous external suture) between the artificial vessel and the superficial femoral artery was performed with GoreCV6 vascular fusion line.) The right common femoral artery, superficial femoral artery and deep femoral artery were dissected out, and the intima of the right femoral artery was edematous and thickened. 4 Fogarty embolization catheter could enter the distal 70 cm of the lower limb artery smoothly, and there was good blood return, and the common femoral artery and deep femoral artery had good blood spray. After the operation, the patient was returned to SICU, the posterior tibial artery of the right limb was palpable, and the posterior tibial artery and dorsalis pedis artery of the left limb were not palpable.