The difference between hemi hip replacement and total hip replacement is as follows: First, hemi hip replacement is mainly to replace the artificial femoral head, while the acetabular side is retained, the operation time is relatively short and the risk generated is relatively low. Total hip replacement is the replacement of both the artificial femoral head and the artificial acetabulum, which is beneficial to the movement of the hip joint, but the operation time is relatively long, so the risk of surgery will be relatively increased. Secondly, hemi hip replacement is mainly suitable for elderly femoral neck fracture, such patients have heavy injury, less daily activities and cannot tolerate the operation for a long time. Total hip replacement is suitable for younger elderly patients, who are relatively healthy and can tolerate the operation, while the patient’s daily activities are also greater, so total hip replacement can meet their daily needs.