Indicator Pre-surgery Post-surgery P value Spinal axis difference via C7 1.16 ± 0.16 (cm) 0.34± 0.11 (cm) p<0.001 Kyphotic angle of thoracic spine T5-T12 19.45 ± 10.6 (degree) 22.6 ± 5.98 (degree) p<0.01 Kyphotic angle of lumbar spine T10-L2 5.68 ± 5.87 (degree) 3.6 ± 1.65 (degree) p<0.001 Lumbosacral curvature (L1S1) - angle 35.95±11.43 (degree) 41.3± 13.8 (degree) p<0.05 Deflection angle of disc under the position of bone welding 16.48±9.36 (degree) 13.53±9.76 (degree) p<0.001 Total number of patient 40 patients The effect of recovering the kyphotic angle of the thoracic spine T5-T12 is statistically significant, the average kyphotic angle right after surgery is 22.6 degrees.