Since the concept of low-friction joint replacement was introduced in the early 1960s, the concept of prosthesis design has been constantly updated, new materials have been applied in the production of prosthesis, artificial hip replacement surgery has been widely carried out, and the surgical technique has been improved day by day, and artificial hip replacement has become a reliable and effective surgical treatment for serious hip diseases. With the introduction of minimally invasive technology and the improvement of surgical techniques, the use of small incisions for total hip replacement has opened up a new way to reduce surgical trauma and surgical complications. Minimally invasive total hip arthroplasty has the following advantages compared with classical surgical incisions: reduced incision length of 7~10 cm; less tissue stripping, less trauma; less intraoperative bleeding, less chance of complications, less pain and less blood transfusion due to small incision and less interference with muscle function; does not affect the placement of the prosthesis and does not increase the incidence of dislocation; small postoperative wound scar, aesthetic; postoperative pain The postoperative pain is significantly reduced, and the postoperative period is conducive to functional exercise and shortens the hospital stay. Characteristics of traditional total hip arthroplasty: The incision is usually about 20 – 25 cm; the large incision causes excessive trauma. Large area of muscle tissue is peeled off during the operation, and there is a large amount of bleeding during and after the operation. Postoperative patients often suffer from severe postoperative fatigue syndrome, which usually aggravates the existing disease and leads to serious complications, making total hip replacement surgery more risky. Oversized wounds can disrupt numerous small blood vessels, leading to lower extremity swelling and venous embolism due to impaired blood return. Although most scholars now believe that the fat embolism syndrome caused by hip arthroplasty is mainly due to high intramedullary pressure, an oversized wound is also a pathway for fat particles to enter the circulation. Small-incision total hip arthroplasty cannot be called minimally invasive in the strictest sense of the word, as it is a modification of the surgical approach and method rather than a completely new technique. The small incision technique is based on proficiency in hip replacement surgery and involves a learning process. The choice of which approach to use should be based on the approach commonly used by the surgeon. Using an unfamiliar approach to install the surgical prosthesis may lead to an increase in early complications, such as neurovascular injury, infection, and thrombosis.