Cervical spondylosis is also a common disease, the probability of occurrence is very high, CT performance has the following points: 1, cervical spine curvature abnormalities, the normal cervical spine curvature should be curved forward convex, with continuous physiological curvature. When cervical spondylosis occurs, the curvature can be straightened, or convex out to the back, manifested as a retrograde arch, and there are continuous physiological curvature discontinuity; 2, osteophytes, osteophytes can occur in the vertebral body, hooked synovial joints, osteophytes will compress the spinal cord or nerve roots to produce symptoms, the small joints hyperplasia can lead to narrowing of the foramen magnum, causing the corresponding symptoms, compression of the nerves, vertebral arteries; 3, intervertebral disc degeneration, degeneration, The intervertebral disc space narrows; 4, the intervertebral disc herniation, after the herniation of the spinal cord or nerve root compression, serious impact on the spinal canal, can lead to spinal stenosis, compression of the spinal cord will produce serious clinical symptoms; 5, the surrounding soft tissues and ligaments calcification, especially the anterior longitudinal ligament, posterior longitudinal ligament, and collateral ligaments, such as thickening, calcification.