Keyhole technology is of great importance in the field of minimally invasive cervical spine, especially in posterior cervical foraminal access for disc removal. With the maturity and popularity of minimally invasive spine technology, percutaneous spinal endoscopy has been gradually applied in the treatment of cervical spondylosis in recent years, and is currently mainly used in the treatment of neurogenic cervical spondylosis. Due to the special posterior structure of the cervical spine, the safe working area under the endoscope is relatively small (no more than 5 mm in diameter) and adjacent to important tissue structures, the cervical spinal cord on the medial side, the articular eminence joint and vertebral artery on the lateral side, and the cervical nerve roots walking in the center of the working area. Before accessing the intervertebral foramen region, some bony structures such as the articular eminence and the vertebral plate need to be removed endoscopically. Because this technique has only been applied to cervical spondylosis in recent years, it is technically demanding and risky, and therefore only a few units at home and abroad are performing this technique. Compared with the traditional anterior or posterior decompression and fixation fusion or simple decompression techniques, spinal endoscopic techniques have the following advantages: (1) the damage to muscle and soft tissues is small, the incision does not exceed 8 mm, and the postoperative recovery is fast; (2) compared with posterior open decompression, the microscopic operation reveals the structure clearly and removes less bony structures, and the postoperative cervical stability is basically unaffected; (3) compared with anterior or posterior fixation and fusion, it can (3) Compared with anterior or posterior fixed fusion, treatment cost can be greatly saved.