Objective To evaluate the stability and compressive mechanical functions of the cervical spine after implanting a new minimally embedded invasive fusion cage made of Nititanium shape memory alloy (NiTi-TFC/C). Method Anterior cervical discectomies were performed on 24 mature sheep spines which were divided randomly into four groups of six sheep cervical spines each: the discectomy group, the autogenic iliac bone graft group, the NiTi-TFC/C group, and the Inter Fix (Sofamor Danek) group. The stability of each group was tested by experimental stress analysis. Result There was no significant difference between the groups of NiTi-TFC/C and Inter Fix in the biomechanical characters (P>0.05). There was significant difference between the groups of NiTi-TFC/C and autogenic iliac bone graft (P<0.05). Conclusion NiTi-TFC/C shows effective characters with high strength and stiffness, less depression displacement. It provides a new kind of device for cervical fusion.