Objective To study the etiology and the anatomical factors of the diseases correlated to spinal vertebra. Method On 16corpses, we observed the displacement of the spinal vertebra and its harmfulness after the intervertebral disc or the ligaments damaged. Result It may give rise to displacement of the spinal vertebra moving the cervical spine after the intervertebral structure damaged. The nerve roots may be stimulated when the intervertebral foramen gets narrow to 1/3. When the intervertebral foramen gets narrow to 1/2 the nerve roots may be constricted. When the cervical spinebends on its side 30°the Luschka joint may get displacement. It may stimulate the vertebralis artery and the sympathetic nerve. Conclusion It is the spinal vertebra diaplacement that give rise to spondylopathy and the diseases correlated to spine. This provides an basis for clinical treatment of diseases correlated to spine.