Microdiscectomy is the latest minimally invasive technique in spinal surgery for the treatment of herniated discs. It uses a posterior approach to remove the herniated disc directly under the endoscope. Unlike the previous discoscopy, on the one hand, it can completely remove the disc, on the other hand, it has the advantages of less damage and faster recovery, and has shown good prospects for application development. It can be said that discoscopy is a leap forward in the history of disc treatment and is a minimally invasive treatment for lumbar disc herniation today. The advantages of minimally invasive treatment: 1, small trauma: the general skin trauma is about 1cm to 1.5cm, which is one tenth of the conventional general traditional surgery. 2.Safety: Since the discoscope micro camera system tracks the whole process and magnifies the operation field more than 60 times, the neurovascular is clearly visible on the display through fiber optic transmission, so accidental injury can be avoided. 3.Fast recovery: you can get out of bed early after surgery and be discharged in a few days, and the symptoms of back and leg pain can be relieved. The damage to the stability of the spine is small. 4. Multi-site and multi-gap disc surgery can be performed at the same time. 5. Short operation time, low postoperative infection rate, less patient pain, short hospital stay, less medication and low hospitalization cost. Indications: 1, conservative treatment for 6~12 weeks, the effect is not satisfactory. 2.Recurring symptoms and serious impact on work and life, with a medical history of more than 3 months. 3, regardless of the length of history, once there is obvious nerve root paralysis damage and other acute disc herniation. 4, central disc herniation combined with cauda equina damage, urinary and fecal dysfunction, CT shows no significant calcification of the intervertebral disc or posterior longitudinal ligament.