The invention discloses an assembled cervical vertebra and unciform joint fusion cage, belongs to the field of medical instruments, and provides an assembled cervical vertebra and unciform joint fusion cage which is more convenient to implant and install. The assembled cervical vertebra and unciform joint fusion cage comprises an intervertebral support body and unciform joint fusion components, wherein each unciform joint fusion component comprises a circle of cofferdam; a bone grafting cavity which is through up and down is formed in the cofferdam; the unciform joint fusion components are correspondingly arranged on the left side and the right side of the intervertebral support body; the assembled cervical vertebra and unciform joint fusion cage further comprises a connecting piece; the intervertebral support body and the unciform joint fusion components are arranged in a split manner; and the intervertebral support body and the unciform joint fusion components can be assembled and installed through the connecting piece. According to the assembled cervical vertebra and unciform joint fusion cage, through the arrangement of the split structure, the implantation and installation canbe carried out in sequence during implantation and installation, so that the problem that the implantation is difficult due to the fact that the implantation is carried out at the same time when theintegrated structure is arranged is avoided. In addition, through the arrangement of the deformable cofferdam, the implantation and installation operation can be facilitated, the fitting effect is improved, and meanwhile, the early osteogenic fusion is facilitated.