Zirconia ceramics have outstanding hydrophilicity. After implantation into the human body, body fluids will form a liquid film between the zirconia ceramic femoral head and the polyethylene acetabular liner. This significantly reduces the wear of the polyethylene acetabular liner，and thus extends the service life of the prosthesis. According to ISO14242-1, the wear amount per million times is only 6.52±1.07mg，as is comparable to the wear amount of the best ceramic femoral head currently available in the world.