As the number of patients undergoing total hip replacement increases and their age tends to be younger, the demand for good postoperative function and survival is also increasing. In the past, the design of the joint prosthesis was nearly perfect, but the performance of the most critical joint bearing surface was not sufficient to achieve the longer survival rate required. With modern advances in materials science, this challenge has been solved. The application of larger diameter surfaces not only prolongs the life of the prosthesis, but also greatly improves the mobility of the joint. The advantages of metal-on-metal large-diameter hip joints are closer to normal anatomy, less wear and tear, greater range of motion than conventional artificial hips, significantly lower postoperative dislocation rates, faster functional recovery, and longer postoperative survival rates, making them more suitable for use in younger patients.