At present, with the advancement of minimally invasive arthroscopic surgery, the major hospitals in our province are gradually focusing on arthroscopic technology and are carrying out various kinds of minimally invasive microscopic surgery on the knee joint one after another. Our hospital has been carrying out knee and shoulder arthroscopy for many years. However, the application of hip arthroscopy lags far behind that of other joints, mainly because of the difficulty of operation techniques and the need for specific instruments, which hinder its development. If you want to carry out hip arthroscopy, you must first be skilled in the arthroscopic techniques of the joints that are easily operated by knee arthroscopy. Second, one must have a thorough understanding of the anatomy of the hip joint. This surgical technique has already been carried out in major cities such as Shanghai and Beijing in China, and the technique is still in a blank state in Nanjing. Our hospital has carried out this kind of project. The main clinical symptom of femoroacetabular impingement syndrome (FAI) is pain in the groin area, followed by non-specific pain in the greater trochanter or hip. It is often misdiagnosed, after which the pain worsens to the point of interfering with daily life. The aim of treatment is to shape the hip joint. Open surgery was performed in the early stage, but it is relatively traumatic and prone to complications such as joint adhesions, postoperative infection and femoral head necrosis, so it is less commonly used in clinical practice. The advantage of hip arthroscopy in the diagnosis and treatment of FAI is that the observation of the lesion is more intuitive, minimally invasive and the diagnosis and treatment can be done simultaneously. The scope of the lesion can be observed more completely during the operation, and the bony abnormalities of the hip joint can be directly observed under the fluoroscopic guidance of the C-arm machine. The principle of this procedure lies in the arthroscopic treatment of the characteristic lesions, such as the anterolateral tear of the acetabular labrum and the degeneration of the anterior acetabular cartilage, through several 1 cm incisions with the aid of a hip traction device and a C-arm X-ray machine, and the debridement of the femoral head and neck junction, the revision of the lateral part of the acetabular labrum and the removal of its peripheral bones. In contrast to open surgery, arthroscopic repair can be accomplished with only a few small 1-cm surgical incisions, resulting in less trauma, faster recovery, and fewer perioperative complications.