It is understood that this technique takes out the protruding intervertebral disc tissue under the supervision of endoscope through a special lateral intervertebral foramen approach, which is less traumatic than the usual posterior surgery. In order to get close to the target, typical laminectomy will inevitably cause extensive damage to the structures that play an important role in spinal stability, which usually requires immediate spinal fusion. On the contrary, the intervertebral foramen endoscope technology gradually expands the intervertebral foramen through the patented reamer and corresponding medical instruments, and completely removes any protruding or protruding fragments and degenerated inflammatory nucleus pulposus. It can also be used for continuous lavage and anti-inflammation, repairing fibrous ring with radio frequency electrode, ablating nerve sensitized tissue, blocking annular nerve branches and relieving patients' soft tissue pain. Clinical advantages of intervertebral foramen mirror