In addition to relieving hip pain and improving joint mobility, it can also maintain joint stability and adjust the length of both lower limbs. At present, it is mainly applied to the following diseases: osteoarthritis, rheumatoid arthritis, ankylosing spondylitis; ischemic necrosis of the femoral head caused by trauma, alcoholism, etc.; non-union of femoral neck fracture or post-fracture necrosis of the femoral head in the elderly; certain tumors of the proximal femur or acetabulum; congenital hip dislocation with severe pain that continues to worsen; failed hip reconstruction or fixation; stable hip for many years Septic hip osteoarthritis or hip tuberculosis. Traditional total hip arthroplasty mostly adopts the posterior-lateral approach, with the incision located on the posterior-lateral side of the hip, which is a long wound, traumatic, and has many complications, and requires dissection of the posterior-lateral muscles of the hip joint during the operation, which causes great surgical damage, bleeds a lot, increases patients’ pain, affects patients’ hip stability, has a high incidence of joint dislocation, is not conducive to early functional exercise, delays patients’ recovery, and increases hospitalization time and treatment costs. Therefore, direct anterior hip arthroplasty is a hot research and development direction in joint surgery. Compared with traditional surgery, direct anterior hip arthroplasty has the following advantages: 1. The length of the lower limbs on the affected side can be adjusted relatively accurately to avoid unequal length of the lower limbs after surgery, and the traditional surgical position requires turning the patient during surgery if bilateral surgery is performed, while the minimally invasive surgical position allows the patient to perform bilateral limb surgery in the same position, avoiding turning the patient and saving surgery time; 3, the joint is not easily dislocated after surgery, because the traditional posterior approach cuts the joint from the rear, and early overflexion of the hip joint is not allowed, otherwise The direct anterior approach preserves the posterior joint capsule intact, which greatly reduces the incidence of postoperative hip dislocation.