[Objective] To observe the effects of postoperative lumbosacral SPR for children with spastic cerebral palsy and long-term stability of the lunbar spine. [Methods] According to their age, 22 children with spastic cerebral palsy who were included in the standard were divided into group A and group B. The lumbar vertebrae positive side, left-right oblique position and dynamic position plain film were taken in 22 children before operation, half a year after operation and at the last follow-up after operation. Then we would measure changes in coronal Cobb angle, lateral lumbar Cobb angle, sacral slope, apical distance, lumbar lordosis index and the Posner index before and after surgery and at the final follow-up. At the same time, the Area Statistics Method was used to measure postoperative laminar regeneration and the life questionnaire survey was conducted. All collected measurements would take statistics to perform in-group and inter-group comparisons. [Results] (1) At the last follow-up, 7 of 22 cases (31.8%) had occasional lumbar pain, 3 cases (13.6%) had occasionally hip pain, 2 cases (9.0%) had occasional knee pain and 1 case (4.5%) occurred knee pain more than once a year. (2) There was no significant difference in the indexes between the preoperative and postoperative follow-up of group A. In group B, there was no significant difference between preoperative and final follow-up except the Coronal Cobb Angle and sacral slope. (3) There was no significant difference in the evaluation of the lumbar instability of the Posner A and B groups before and after the surgery. (4) Only comparative laminectomy defect rates were significantly different betweem group A and B. The average rate of lamina defect in group B was higher than that in group A. (5) Although there were 2 cases of L5, S1 spina bifida and 10 cases of mild scoliosis before operation in group A, there was no significant increase in Cobb angle after operation. In group B, 6 cases had mild scoliosis before operation and 10 cases had mild scoliosis after the last follow-up. (6) There was no lumbar spondylolisthesis or lumbar spondylolysis in both groups. [Conclusion] The selective spinal rhizotomy in the lumbosacral segment had no significant influence on the stability of the lumbar spine in the mid to long-term. Moreover, the younger children got operated, the better effective improvement in the lamina regeneration.