Straightening of the cervical spine physiological curvature is very common in young and middle-aged people, and it is an early manifestation of cervical spondylosis. The physiological curvature of the cervical spine can increase the elasticity of the cervical spine, reduce and cushion the shock of gravity, and prevent damage to the spinal cord and brain. When the cervical curvature straightens, it leads to increased pressure on the cervical discs and tension in the paravertebral muscles, so it is an early warning sign of cervical spondylosis, which is likely to develop into serious cervical spondylosis in the future if not intervened. There are four main points to note: 1, is to avoid doing “low head” as far as possible, to reduce the time of low head, including ambulation work, using the computer, look at the cell phone or driving. 2, is low head work to interrupt at the right time, take the initiative to practice head tilting movements, such as looking at the ceiling, cervical exercises, etc. 3, pay attention to sleeping posture, try not to diagnose high pillow. 4, to be corrected by appropriate exercise, the best way is to swim, especially breaststroke, the standard breaststroke air change action is the best exercise method for cervical spine curvature.