Ischemic necrosis of the talus of the ankle joint is caused by a severe injury to the ankle joint that completely destroys the blood supply to the talus. The talus is an important bony structure that constitutes the ankle joint, and it is the only bone in the whole body without muscle attachment, which is relatively fragile. When the ankle joint suffers from serious injury, the blood supply of the talus can be completely destroyed, resulting in ischemic osteonecrosis, and eventually the talus body may collapse and deform, leading to osteoarthritis of the ankle joint. Usually, patients will have localized joint pain, limitation of ankle flexion and extension activities, etc. When the above clinical symptoms occur, they should go to the hospital in time for X-ray examination, which can reveal the disappearance of structural disorders of the talus trabeculae or bone collapse and sclerosis, etc. If the diagnosis is confirmed, the patient should be actively treated. If the diagnosis is confirmed, the patient should be actively treated under the guidance of specialized doctors.