Similar to a spinal endoscope, an intervertebral foramen is a light-equipped tube that enters the intervertebral foramen from the side or side and back of the patient’s body (either in a flat or oblique fashion) and performs the procedure in a safe working triangle. The procedure is performed outside the disc’s fibrous annulus, and the herniated nucleus pulposus, nerve roots, dural sac and hyperplastic bone tissue can be clearly seen under direct endoscopic vision. The herniated tissue is then removed using various types of grasping forceps, the bone is removed microscopically, and the broken fibrous annulus is repaired with radiofrequency electrodes. The surgical trauma is small: the skin incision is only 7mm, like the size of a soybean grain, bleeding is less than 20ml, and only 1 stitch is needed after the operation. It is the minimally invasive treatment for disc herniation with the least trauma and the best effect among similar surgeries. Pre-operative precautions: 1. Discontinue anticoagulants for at least 10 days for the purpose of reducing intraoperative and postoperative bleeding to form a hematoma. 2. Adjust blood sugar to less than 8 on fasting and less than 10 after meals. 3.No infectious diseases such as cold, fever and periodontitis should be present. The surgical area must not have infectious skin diseases or unhealed skin wounds. 4.The clinical symptoms are clear, persist for more than 3 months, and, after more than 3 months of conservative treatment is ineffective, those who affect normal work and life can be hospitalized for minimally invasive surgery treatment. 5.A follow-up file should be established before surgery to firstly assess the severity of the disease before surgery for efficacy assessment.