The invention discloses a joint fusion cage. The fusion cage comprises a supporting block and a lock screw, wherein the supporting block is a wedge block, and one or more fusion holes are formed in the supporting block; the lock screw is used for fixing the supporting block. According to the joint fusion cage, the fusion holes are formed in the supporting block, so a cancellous bone can be conveniently implanted, or bone adjacent to the implanted part can grow in, so that bone and an implant can be fused, fixation and fusion can be realized in one operation, and the cancellous bone is stressed by adopting the wedge block structure, and the fusion can be facilitated.