A 19-year-old boy from Anhui province was working with his cousin in Shanghai when he accidentally fell from a building during working at height and suffered multiple fractures of the left femur and pelvis. He was admitted to the burn trauma care unit of Changhai Hospital in an emergency, with blood pressure as low as 70/44mmHg. He was sent to the catheterization laboratory urgently, and bilateral internal iliac artery embolization was performed with the efforts of my colleagues and I. The bleeding stopped and the blood pressure rose to 120/70 mmHg. A young life was successfully saved. Reviewing and analyzing the case, it is inevitable to mention the pelvic fracture haemorrhage. Our pelvis consists of sacrum, iliac bone, sit bones, pubic bone, and its composed cavity wraps part of the intestine, bladder, prostate, seminal vesicle gland and other important organs, the mentioned tissues and bone blood supply are rich, once injured can cause lethal hemorrhage. In the acute phase of trauma, the most important task is to stop bleeding, and how to stop bleeding is the key. Posterior pituitary hormone? Surgical intervention? I am afraid that internal iliac artery embolization is the lifeline at this time. How to embolize? Another question. In the face of multiple injuries, embolization of the arterial trunk is not the best option, because other collateral branches will soon be created and bleeding will occur again. The right choice is to embolize the internal iliac artery bilaterally with coarse gelatin sponge pellets, which can achieve good hemostasis and avoid serious complications. The gelatin sponge is a medium-term embolic agent, and when the trauma improves, the embolized vessels can be recanalized without affecting the blood supply to the organs.