The present disclosure provides an acetabular defect reconstructive prosthesis, comprising: an iliac support, the iliac support including a support seat (11) and a connecting wing plate (12) provided on the support seat (11), and the support seat (11) being contacted and matched with an ilium (1)； and an acetabular cup (20) rotatably connected with the support seat (11) together. The technical solutions of the present disclosure can effectively solve the problems of reconstruction and long-term stability of a peri-acetabular defect in the related technology.
