Vertebral artery vascular ultrasound demonstrates a segmental, tubular, echo-less structure that can be seen primarily through the interspace of the cervical spine. The vertebral artery originates from the subclavian artery, passes through the foramen transversarium, and travels upward in the posterior aspect of the atlantoaxial vertebrae, passing through the foramen magnum of the occipital bone into the cranial cavity. Ultrasound to see the vertebral artery blood vessels, only part of it, ultrasound mainly to observe the wall structure of the vertebral artery and the internal blood flow of the vertebral artery, blood flow to use color Doppler to detect the direction of the blood flow, in addition to observing the vertebral artery with or without plaque formation, to measure the vertebral artery vascular internal diameter, normal in 3~5mm, bilateral vertebral arterial vascular internal diameter is generally asymmetric. The performance of vertebral artery vascular ultrasound should consult the clinician in a timely manner, such as the appearance of abnormalities, the cause should be clarified in a timely manner after targeted treatment.