Intradural arachnoid cysts are completely different from intracranial arachnoid cysts, either subdural or epidural, and are generally characterized by long segmental length and significant spinal cord or nerve compression. Patients mainly present with numbness, distension, or lower extremity weakness at or below the lesion. The traditional surgical approach at home and abroad is to open the full segmental spinal canal where the arachnoid cyst is located and perform debridement and resection, find and close the fistula, and then perform internal fixation of the spine. The disadvantages of this procedure are: 1. The incision is often more than 10 or even 20 cm, and the posterior spinal canal bone needs to be removed in long segments. Large surgical trauma and injury;. 2, spinal stability and mobility is affected, the operation is not worth the loss. As the spinal canal needs to be opened in long segments, the stability of the spine is severely affected, so it is necessary to do internal fixation with nails and rods, and the discomfort caused by internal fixation is inevitable after spinal fixation, and some even have postoperative symptoms that are more serious than the preoperative symptoms, which is not worth the loss. 3, high hospitalization costs. Internal fixation materials often need 30-50,000, and because of the surgery trauma, hospitalization time is extended, the cost will inevitably increase. 4, high recurrence rate. Because the fistula of the lesion is difficult to find or find all, recurrence often occurs after surgery. 5.Many surgical complications such as cerebrospinal fluid leakage from the incision and infection. Arachnoid cysts are adherent to the dura mater, and long segmental stripping of cysts can easily damage the dura mater causing cerebrospinal fluid leakage, which is difficult to treat and can easily cause incisional infection or even surgical failure, requiring the removal of internal fixation staples. After in-depth observation and study of the physical characteristics of spinal intracanalicular arachnoid cysts, our department has tried a new minimally invasive approach to treat long-segment intracanalicular arachnoid cysts since August 2014, and has achieved exciting and good results. This minimally invasive procedure completely avoids the disadvantages of traditional surgical methods: 1. Minimal trauma. We started with microscopic surgery, which required an incision of 3-3 or 5 cm (which is already much better than traditional surgery), and with experience and methodological improvements, we have now changed to endoscope-assisted microsurgery, where the incision is only 2 or 5 cm long. 2, spinal stability and mobility are not affected. Since there is no effect on the three columns that maintain the stability of the spine, the surgery does not affect the stability of the spine at all, and of course there is no need for internal fixation at all. The patient’s symptoms disappear immediately after surgery, and there is no discomfort caused by internal fixation. 3. Hospitalization costs are significantly reduced. As no internal fixation is needed, the cost of internal fixation is naturally saved. Patients can be discharged on the day of surgery and 2-3 days after surgery, so the hospitalization cost is obviously reduced. 4.Low recurrence rate. Theoretically, the method does not aim to find fistula, and there is no need to find fistula during surgery, so there is no problem of postoperative recurrence of the lesion due to fistula omission. There are no recurrences so far, but of course, the follow-up period is still short and the long-term efficacy remains to be observed. 5. Less surgical complications. Due to the small surgical incision, small trauma, no need for long segmental stripping of the arachnoid cyst, and now the use of special materials to close the muscle layer outside the spinal canal, there is basically no problem of cerebrospinal fluid leakage and incisional infection. Considering that there is a world of difference between conventional treatment and the minimally invasive treatment we propose, we have written this article in order to provide the best minimally invasive treatment for this type of patient. Patients with this disease can contact us, and those who want to learn more about minimally invasive treatment methods for this disease can also consult with us, so that more patients with this disease can benefit. I also hope that patients who have benefited from this treatment will bubble over to this site and tell us about their experiences. In fact, we have already achieved minimally invasive treatment for many diseases in neurosurgery, so I hope everyone can benefit from it!