The diagnostic criteria of vertebral artery stenosis need to be analyzed comprehensively based on the patient’s medical history characteristics, clinical symptoms, auxiliary examination and other information, and the common auxiliary examinations include cervical vascular ultrasound, CT angiography, cerebral angiography and so on. 1. Medical history: whether the patient has a history of atherosclerosis and related risk factors, such as hypertension, diabetes mellitus, hyperlipidemia, smoking and so on. 2. Clinical diagnosis: Vertebral artery stenosis may have no clinical symptoms, or it may be manifested as dizziness, nystagmus, vomiting, unsteady gait, dyskinesia, visual disturbances, dysarthria, swallowing disorders, paralysis, diplopia, hemianopsia, coma and other symptoms of ischemia in the posterior circulation. 3 Auxiliary examination: Final diagnosis should be combined with vertebral artery imaging examination, such as cervical vascular ultrasound, CT angiography, cerebral angiography, etc. The gold standard is cerebral angiography, which can clarify whether there is vertebral artery stenosis and its degree of stenosis. It is recommended that patients make a diagnosis under the guidance of a doctor and not blindly diagnose on their own to avoid delaying their condition.