Hip impingement syndrome is a common disorder that causes chronic hip pain and limited hip flexion and internal retraction, and is a common cause of osteoarthritis of the hip joint. It is a common cause of hip osteoarthritis. It can be divided into two types according to different anatomical abnormalities: Cam cam collision and Pincer’s pincer collision. The hip radiographs can reveal a lack of concavity between the femoral head and neck, which is manifested by the lateral extension of the femoral head projection and the reduction or disappearance of the concavity between the head and neck, while CT and MRI can reveal anatomical abnormalities of the femoral head and neck junction and acetabulum that are not obvious. MRI is more accurate than radiographs and CT in showing glenoid margin lesions, adjacent cartilage lesions, subchondral cystic lesions and synovial hernias.