I. Introduction: Intervertebral foramen is a kind of spinal endoscope, which includes a tube equipped with a light, and corresponding supporting spinal minimally invasive surgical instruments, imaging and image processing system, and dual-frequency radiofrequency machine, which together form a spinal minimally invasive surgical system. It enters the intervertebral foramen from the side or the side and back of the patient’s body, and does the surgery outside the intervertebral disc fibrous ring, where the protruding nucleus pulposus, nerve root, dural sac, and proliferated bone tissue can be clearly seen under direct endoscopic vision. Then all kinds of grasping forceps are used to remove the protruding tissues, microscope to remove the bone, and radiofrequency electrode to repair the broken annulus fibrosus. It is the minimally invasive treatment for herniated disc with the least trauma to the patient and the best effect among similar surgeries. Second, suitable for intervertebral foramenoscopy: The principle of minimally invasive intervertebral disc removal under intervertebral foramenoscopy is also the decompression of the nerve root, which can be commonly understood as “removing the stone that oppresses the nerve” to alleviate the symptoms. Suitable people include: 1. various types of lumbar disc herniation, 2, disc nucleus pulposus prolapse or free, 3, open surgery failure, 4, intervertebral foraminal stenosis, 5, calcified lesions, 6, discogenic back pain. Advantages of intervertebral foramenoscopy: 1, minimally invasive and high security: clear surgical field, no need to destroy the paraspinal muscles, ligaments, no need to bite off the vertebral plate, the stability of the spinal column is not affected. 2.Precise localization and direct purpose: the targeting and localization puncture technique under the mirror can accurately remove the protruding nucleus pulposus, and the surgical effect is exact. 3, local postoperative pain: local anesthesia to complete the operation, can interact with the patient, greatly reducing the risk of injury to the nerves; immediately after the operation to relieve pain, high patient satisfaction. 4, very small trauma is not easy to bleed: the surgical incision is only 7 mm, basically no bleeding, no postoperative scar proliferation, resulting in adhesion of the nerve. 5, not easy to recur: the success rate of surgery is about 93%, and the recurrence rate is less than 4%, and the success rate of treating recurrent disc herniation is more than 85%. 6, fast recovery: short operation time; fast recovery, you can go down to the ground the next day after the operation, and resume normal work and physical exercise in 3-6 weeks on average.