Abstract: Further understanding of the sagittal curvature of the cervical spine plays an important role in the study of the pathogenesis of cervical spondylosis and adjacent spondylosis, as well as in improving the surgical effect. In the past literature, there have been many studies on the relationship between the thoracolumbar curvature and patients' quality of life or functional status, while there are few studies related to cervical curvature, So it is necessary to carry out prospective studies with a large number of cases. This article reviews the measurement method of cervical curvature, the normal curvature of the cervical spine, the relationship of cervical curvature with cervical spondylosis and clinical effects, etc., so as to provide a reference for spine surgeons to understand and treat cervical spondylosis.