Surgery for osteonecrosis of the femoral head is generally associated with certain risks. Total hip replacement surgery is often considered for femoral head necrosis, especially advanced and moderately advanced femoral head necrosis with secondary osteoarthritis. The main risks of total hip replacement surgery are dislocation of the prosthesis, periprosthetic fractures, and the presence of lower extremity deep vein thrombosis. Although the chance of lower extremity deep vein thrombosis is not high, once it forms, the risk is relatively high and it may cause pulmonary embolism and even endanger life. If the patient has osteoporosis, he or she is prone to fracture of the prosthesis placement when installing the prosthesis and pressing and fitting the prosthesis. If the patient is in poor health and also has a variety of chronic diseases, joint infection may occur after joint replacement, which is also a major risk.