Osteonecrosis is a common clinical disease in orthopedics, which is a disease of the femoral head with interrupted or impaired blood supply, followed by structural changes in the femoral head, femoral head collapse and joint dysfunction. Although there are many treatment methods, the efficacy is not very satisfactory, and it often progresses to collapse or further aggravates the existing collapse, and eventually hip replacement has to be performed. Liu Zhao, Department of Orthopedics, Xuanwu Hospital, Capital Medical University Modern medicine believes that the treatment for femoral head necrosis is surgery. Experts at home and abroad advocate palliative surgery for early necrosis, such as core decompression, bone grafting with blood vessels, vascular implantation, bone stenting, etc. Artificial joint replacement is unavoidable in late stage, etc. However, in general, it seems that surgical treatment is not accepted by many patients because of its pain, high cost, long recovery period, extensive limitations, and unsatisfactory long-term results. Therefore, the use of effective methods to prevent the occurrence and development of femoral head necrosis and promote the regeneration of new bone in the necrotic area has become the focus of orthopedic surgeons. Our orthopedic department actively studies the new technology and new business of treating femoral head necrosis at home and abroad, and introduces the latest method of treating femoral head necrosis: porous tantalum metal rod. This method has the advantages of minimally invasive, rapid and simple operation: the operation is conducted under C-arm guidance, the skin incision on the patient’s surface is only about 1cm, bleeding is 10-20ml, and the operation time is 30min-45min. this treatment enables the patient to obtain the maximum benefit with the minimum cost. Porous tantalum metal rods provide a new option for clinical treatment of early femoral head necrosis, slowing down the progression of the disease and delaying joint replacement, which is currently an effective method for the treatment of early femoral head necrosis in orthopedics.