Novel double-action hip joint prosthesis

The invention discloses a novel double-action hip joint prosthesis. The novel double-action hip joint prosthesis mainly comprises an acetabular cup, a polythylene liner, a locking ring and a femoral head and is characterized in that a circle of groove is formed at the bottom of the polythylene liner; firstly, the femoral head is put into a ball socket of the polythylene liner, and then the locking ring is put into the groove of the polythylene liner and is arranged at the upper end of the femoral head; and the polythylene liner is externally arranged in the acetabular cup. The novel double-action hip joint prosthesis has the beneficial effects of being capable of solving the risk problem of dislocation of the femoral head in polythylene liner, not only being convenient to implant during operation, but also avoiding the dislocation risk of the femoral head after operation; and due to adoption of the novel double-action hip joint prosthesis, relatively good initial fixation and good long-term fixation of the femoral head in the polythylene liner are achieved, and the femoral head is convenient to install.