Surgical method: In this group, tracheal intubation plus intravenous compound anesthesia was used, methylprednisolone 1000mg was given as a slow sedative when cutting the skin, the sedative time should be more than two hours, the posterior median approach was performed, according to the location of the tumor shown by MRI, preoperative Melan positioned the spine of the operated vertebral body stage, the posterior median straight incision was made with the lesion segment as the center, firstly, the paravertebral muscle was separated from the side of the spine with an electric knife, gauze was used to stop the bleeding. The paravertebral muscle can be separated from one side by using the hemivertebral plate or plate opening technique, and it is best not to damage the articular eminence joint by removing the hemivertebral plate and the upper and lower openings between the adjacent vertebral plates to the lateral side. If full laminectomy is required, the paravertebral muscles on the other side should be separated in the same way. The extent of laminectomy should be based on revealing the upper and lower levels of the tumor, and the width should be close to the articular eminence joint. It is best to preserve the supraspinous and interspinous ligaments for postoperative stability of the spine. After the laminae are separated, the supraspinous and interspinous ligaments of the upper and lower stages are removed, the spinous process is lifted, the adhesive ligaments are cut with scissors, and the laminae are removed intact, with great care to prevent injury to the spinal cord. The ligamentum flavum and epidural fat are further removed to fully expose the dura mater. Subsequent operations are performed under the microscope. The dura is cut longitudinally and draped to both sides. The soft spinal membrane is incised longitudinally and secured to the dura mater with titanium clips to both sides. This completes the full exposure of the spinal cord. (See Figure 1) Superficial tumors are removed strictly along the tumor and spinal cord border separation. (See Figure 2) For deeply located ventricular meningioma, the spinal cord must be cut strictly along the full length of the tumor in the posterior median sulcus. (See Figure 3) Since the growth of the tumor has deformed the spinal cord, the median spinal cord may not be the location of the posterior median sulcus, and the posterior median sulcus may be pushed to one side, and the exact incision of the posterior median sulcus during surgery depends on the experience of the operator. After exposing the tumor, the tumor is excised using a microneurosurgical technique. (See Figure 4-5)