Semi-pelvic prosthesis

The invention belongs to the technical field of designing and manufacturing of prosthesis and relates to semi-pelvic prosthesis. The semi-pelvic prosthesis is characterized by being formed by connecting an ilium fixing part, acetabulum prosthesis, and a pubis connection part, wherein the ilium fixing part is used for being connected and fixed with a residual iliac wing and sacrum; the pubis connection part is used for being connected and fixed with the residual pubis on the same side or pubis on an opposite side; the ilium fixing part and the acetabulum prosthesis are connected by a tapered rotation prevention clamp port; and the acetabulum prosthesis and the pubis connection part are fixed and connected by a bolt. The semi-pelvic prosthesis has the advantages that (1) compared with assembled prosthesis, hot bending forming integrated prosthesis is disperse in stress; (2) the semi-pelvic prosthesis and the residual iliac wing are fixed by a self-locking nail, and the sacrum and the residual pubis are fixed by a self-locking nail, so that loosening of the bolt can be effectively prevented; and (3) the semi-pelvic prosthesis is provided with a flat supporting structure, so that the interfacial stress between the prosthesis and the sacrum, and between the prosthesis and the pubis can be converted from shear force or tensile stress into pressure stress, the loosening or displacement of the prosthesis is prevented, the long-term stability of the prosthesis is facilitated, and the prosthesis cannot be broken easily when complex force is applied to a human body for a long time.