The patient is a male, 240 years old, who was admitted to the hospital 1 hour after the main cause of blunt contusion in the left groin. Admission findings: swelling in the left groin area, low skin temperature of the left lower extremity, no palpable fluctuation of the left N artery, dorsalis pedis artery, and posterior tibial artery.CT showed: pelvic fracture, and a huge hematoma in the left groin. Intraoperatively, the left external iliac artery was seen to have a severe contusion of about 10 centimeters in length, and the distal end was severed, so the left external iliac artery was artificially vascularized and replaced, and the operation went smoothly, and the artery of the left lower limb was palpable and pulsating after the operation, and was discharged from the hospital without any problems.