Wear has been recognized as the key factor affecting the long-term performance of orthopaedic implants such as hip,knee and spine prostheses.Joint simulators,such as hip and knee joint simulators,are used to simulate the biomechanics of human joints and served as product-level wear tests for artificial joints.In this study,a new Biotriboligical simulator(HSMS4203)was designed and built for the wear testing of artificial hip joints.Friction measurement,as a new online monitoring in hip simulator wear testing,has been set up and assembled in HSMS4203.Long-term validation tests were conducted with a module of a 28 mm CoCrMo femoral head against conventional ultra high molecular polyethylene(UHMWPE)and cross-linked UHMWPE acetabular cups.The performances of simulator together with the testing results are discussed.Results show that the simulator can provide a valid and reliable methodology for the biotribological studies of artificial hip joints.