1.PEEK material, elastic modulus close to cancellous bone, reduce stress shielding, effectively prevent collapse. 2. Large area of bone graft and easy fusion. 3. Positioning needle can be preset to facilitate intraoperative tracking. 4. Diversified shapes and specifications are more consistent with anatomical structure. 5. The upper and lower surfaces are designed by fixed teeth to fit the upper and lower end plates, which is conducive to fixation and stability.