The lumbar spine is one of the main components of the spine and as a whole, the spine is composed of the cervical, thoracic, lumbar and sacral vertebrae. The lumbar vertebrae are located in the lower part of the spine vertebrae are located in the lower part of the spine and have motion, load and protection functions. Since it is connected to the thoracic vertebrae and the sacral vertebrae, its load and stability functions are particularly important. The intervertebral discs are the intervertebral joints that connect the vertebrae, accounting for 1/4 of the total length of the spine, and are the main joints of the spine. There are 23 intervertebral discs in the human body. The intervertebral disc is located between two vertebral bodies and consists of three parts: the nucleus pulposus, the annulus fibrosus and the cartilage plate, of which the nucleus pulposus is the central part; the annulus fibrosus is the peripheral part, encircling the nucleus pulposus; and the cartilage plate is the upper and lower part, directly connected to the vertebral bone tissue. The lumbar intervertebral disc also plays a special function in helping the spine bear the weight of the trunk, linking the limbs, maintaining the normal physiological posture of the entire body, and performing various movements of the trunk. 1, to maintain the height of the spine; 2, to maintain height; 3, to link the upper and lower vertebrae of the intervertebral disc; 4, so that there is a certain degree of mobility between the vertebrae; 5, so that the surface of the vertebral body bears the same; 6, the role of cushioning, playing the role of elastic cushion.