Cervical spine X-ray examination includes frontal and lateral radiographs, double oblique radiographs, hyperextension and hyperflexion radiographs, and open-ended radiographs, which show different significance of the disease in different positions. Frontal and lateral radiographs can clarify the spinal sequence, spinal physiological curvature, vertebral hyperplasia and vertebral space, and the narrowing of the vertebral space should be considered whether there is disc herniation; double oblique radiographs can understand the intervertebral foramen; hyperextension and hyperflexion radiographs can understand whether the spinal series is stable and whether there is slippage. The open-mouth film is used to understand whether there is total or subluxation of the upper cervical spine and atlantoaxial joint.