Involved in the composition of the anterior wall of the spinal canal are the vertebral bodies, the back of the intervertebral discs and the posterior longitudinal ligament. The posterior wall of the spinal canal consists of the vertebral plates and the ligamentum flavum, and the posterior longitudinal ligament is the most important structure in the maintenance of spinal stability. The most important structure in the composition of the anterior wall of the spinal canal is the posterior longitudinal ligament, which is the long ligament of the spine, originating from the central vertebrae and continuing with the vertebral body covering the cardinal vertebrae, and reaching down to the sacrum. It is closely connected to the annulus fibrosus of the intervertebral disc and the upper and lower margins of the vertebral body, while the combination with the vertebral body is more lax, which has the effect of limiting the excessive forward flexion of the spine. The posterior longitudinal ligament has the function of limiting excessive forward flexion of the spine and preventing the disc from prolapsing backwards. If the posterior longitudinal ligament is under tension for a long period of time, it will lead to strain, hyperplasia, calcification, and ossification, which will lead to narrowing of the spinal canal and compression of the dural sac, resulting in painful and uncomfortable manifestations. If the patient has any discomfort, it is recommended to consult a doctor in time, under the guidance of a professional doctor to clarify the cause of the disease and carry out targeted treatment, so as to avoid delaying the condition.