Posterior circulation ischemia refers to transient ischemic attack (TIA) of the carotid system and cerebral infarction in the posterior circulation. Synonyms include ischemia of the vertebrobasilar system, TIA of the posterior circulation with cerebral infarction, vertebrobasilar artery disease, and vertebrobasilar thromboembolic disease. Given that MRI diffusion-weighted imaging finds that about half of posterior circulation TIAs have definite infarct changes and the boundary between TIA and cerebral infarction is becoming increasingly blurred, it is beneficial for clinical operation to cover TIA of the posterior circulation with cerebral infarction by posterior circulation ischemia. 1. Active control of various vascular risk factors Given that embolism is common, etiological examination should be actively carried out. Antithrombotic therapy should be performed for those with a clear diagnosis. The use of antiplatelet agents alone or in combination has an important preventive effect. The efficacy of vascular stenting needs to be further clarified. 2, missionary education Actively carry out the continuing re-education of posterior circulation ischemia especially for physicians, update the concept and knowledge, and no longer use the concept of insufficient blood supply of vertebrobasilar artery. Propaganda should be strengthened to correctly grasp the early manifestations of posterior circulation ischemia to achieve early detection and early diagnosis. The risk factors of posterior circulation ischemia should be correctly understood and a scientific view of prevention should be established.