Although conventional laminectomy can also obtain good exposure of the operative area, its occlusion of the spinous process and the vertebral plate creates a postoperative defect of the spinous process and the vertebral plate, and the defect of the spinous process and the vertebral plate cannot be repaired at the time of closure, although the dura is sutured, which makes the spinal cord and cerebrospinal fluid directly covered by muscle and skin and loses the protective effect of the bony barrier. Also lacking effective protection of the vertebral plate, adhesions of the dural sac and nerve roots occur, which can produce new postoperative complications. Laminar repositioning can provide a bony support and pressure countermeasure to prevent further enlargement of the small unhealed supradural fissure due to increased intracranial pressure during the postoperative course, thus reducing the incidence of cerebrospinal fluid leakage. In addition laminar repositioning promotes early attachment of the paravertebral muscles to the lamina and spinous process, preventing the formation of a dead space between the muscles and the dura, as well as preventing the pooling of cerebrospinal fluid in this area, which can lead to complications such as subcutaneous effusion, persistent hypothermia, and cerebrospinal fluid leakage. The laminar repositioning maintains anatomical integrity and has a protective effect on the normal spinal cord tissue in the spinal canal, avoiding and reducing complications common to surgery for intradural disease, while preventing postoperative scar adhesions and compression. The repositioning of the vertebral plate also accelerates the surgical progress, reduces bleeding, and prevents and aggravates spinal cord injury. It is in line with the development direction of modern neurosurgery of minimally invasive and refinement. It has good social and economic benefits and application prospects. The following are the advantages of using lamellar repositioning technique for primary tumor surgery in the spinal canal: 1. The use of micro-abrasive drill to remove the entire spine of the vertebral plate shortens the operation time and reduces bleeding; 2. It not only avoids the mechanical stimulation and impact injury to the spinal cord caused by repeated invasion of the lamellar occlusion forceps and nibbling-like decompression instruments, but also avoids the stimulation to the blood supply vessels of the spinal cord, thus effectively preventing ischemia-reperfusion injury to the spinal cord 3, the micro-abrasive drill results in less bone loss, convenient and accurate in-situ repositioning and fixation of the vertebral plate spine without easy displacement during reconstruction, and good bony healing, which is less likely to cause medically induced spinal stenosis without excessive bone crust formation at the osteotomy; 4, the bony spinal canal is restored after repositioning of the vertebral plate spine, which prevents the formation of laminectomy membrane and the compression and re-injury of the spinal cord by epidural fiber scar adhesions; 5, the vertebral plate spine The restoration of the integrity of the dorsal structure of the spine, the normal sequence and physiological characteristics of the spine, ensures the stable formation of the spinal canal and the stability of the spine, and at the same time effectively expands the spinal canal to maintain and rebuild the stability of the spine, the patient gets out of bed early, and reduces the patient’s pain and economic burden.