Artificial joint replacement has become the preferred treatment for serious joint disorders and is widely used in many countries, with about 1.8 to 2 million artificial joint replacement surgeries performed worldwide each year. With the development of our national economy and the improvement of people’s living standards, the number of artificial joint replacement surgeries is increasing due to various factors. It is estimated that the future will grow at a rate of about 15-20% per year, up to 100,000 cases/year. However, artificial joint replacement is a high-level surgery in the field of orthopedics, which requires the surgeon to have a deep understanding and knowledge of the physiology, anatomy, pathology and related diseases of the joint, and to be proficient in the material science, mechanics, design concepts and operating instruments of the artificial joint, as well as to have excellent surgical skills. It takes more than 10 years of clinical training and study in orthopedics and joint surgery for a surgeon to be able to perform artificial joint replacement surgery well. For various reasons, the training of joint surgeons in China is not yet complete and joint replacement cannot be performed at will. For patients, the first thing they want to know is whether they need to receive artificial hip arthroplasty. We summarize the specific cases including: 1, ischemic (aseptic) necrosis of the femoral head 2, congenital hip dysplasia (dislocation) or hip developmental deformity due to various reasons during childhood 3, degenerative hip joint degeneration (osteoarthritis, osteophytes) 4, traumatic fracture: acetabular or femoral head comminuted Fracture, femoral neck fracture, intertrochanteric fracture in the elderly 5, infectious diseases: septic arthritis, hip tuberculosis, etc., need infection control, lesion stability before replacement 6, rheumatoid arthritis of the hip joint 7, ankylosing spondylitis patients involved in the hip joint 8, synovial diseases: synovial chondromatosis, pigmented villous nodular synovitis 9, tumors: hip joint bone tumors and surrounding tumor invasion Hip joint In the past, it was thought that young patients should not undergo arthroplasty, but with the rapid development of artificial joint materials, design concepts and surgical techniques, age is no longer a strict criterion for surgery or not. In general, you can receive an artificial hip replacement if you want a pain-free, functional and stable hip joint and meet these conditions: developmental maturity; hip disease has progressed to a more severe level; pain or dysfunction interferes with life and work; and no other better treatment is available.