(Firstly, relieve hip pain, secondly, improve hip function) 1, old femoral neck fracture: the head and socket have been destroyed and pain, affecting the function of the person; 2, ischemic necrosis of the femoral head: including traumatic, idiopathic, cortisone alcoholism caused by ischemic necrosis of the femoral head; Ⅰ, Ⅱ stage of feasible drilling and decompression of the head and neck, the thick augmentation area of rotational osteotomy and other surgeries, for the Ⅲ, Ⅳ stage of femoral ischemic necrosis, ischemic necrosis, the femoral head has collapsed, deformation, the acetabulum has been damaged, total hip replacement is feasible. For stage Ⅲ and Ⅳ ischemic necrosis of femoral head, the femoral head has been collapsed, deformed, acetabulum has been destroyed, total hip replacement is feasible; 3, degenerative osteoarthritis: most common in the elderly, for severe pain of osteoarthritis, the effect of artificial femoral head replacement is not good, total hip replacement should be carried out; 4, rheumatoid arthritis and ankylosing spondylitis: most common in the younger patients, due to: 1, intolerable pain in the hip or due to the ankylosis and activity Severe limitation; 2, deformity of the hip joint often causes concomitant deformity of other joints; 3, due to contracture and fibrosis of the hip joint capsule and muscles and other soft tissues, the range of joint activity is small, the patient, although the age of the patient is relatively young, but its physiological age aging should relax the age limit, early artificial total hip arthroplasty; 5, hip ankylosis: hip pain is the most important indication of surgery. Unilateral hip joint physiological position ankylosis without pain is not a surgical indication; not completely bone ankylosis of the hip joint, but there is pain and deformity of the feasible artificial total hip replacement; 6, chronic hip dislocation: mainly including congenital hip dislocation, acetabular dysplasia, and due to trauma and infection caused by the stale dislocation; hip subluxation and hip traumatic arthritis, the patient’s pain or loss of function, 45 years of age or older patients can be considered for artificial total hip replacement. Patients over 45 years old can be considered for artificial total hip replacement; 7. Failed arthroplasty cases, including post osteotomy, post head and neck resection, and post double-cup artificial femoral head and total hip arthroplasty cases. The main indications for resurfacing surgery are hip joint pain, poor joint mobility or in order to adjust the length of the limb is not an indication for surgery, and the indications for resurfacing surgery are: 1, hip joint pain caused by loosening of the prosthesis; 2, fracture of the stem of the prosthesis; 3, dislocation of the prosthesis, and failure of manipulation of the restoration of the prosthesis; 4, wear and tear of the acetabulum caused by the prosthesis to cause a central dislocation and pain; 8, bone tumors: low-grade malignant tumors that are located in the neck of the femoral head or the acetabulum; 8, bone tumor: located in the neck of the femoral head or the acetabulum. Acetabular low malignant tumors, such as: giant cell tumor of bone, chondrosarcoma, can be considered to perform artificial total hip replacement, such as lesions affecting the greater trochanter, the application of special artificial hip joint.