Posterior circulation ischemia has a great impact on the daily life of patients, all should be treated and prevented actively, so how to treat and prevent posterior circulation ischemia? Treatment Acute treatment: There is still a lack of results from large randomized controlled studies specifically on posterior circulation ischemia, therefore the acute management of posterior circulation ischemia is the same as that of anterior circulation ischemic stroke. An organized treatment model for stroke units should be actively pursued. Intravenous thrombolysis with recombinant tissue-type fibrinogen activator (rt-PA) can be undertaken in appropriate patients within 3 hours of onset. The treatment time window can be relaxed for those who are eligible for intravenous thrombolysis. For all those who are not suitable for thrombolytic therapy and have no contraindication, they should be treated with aspirin 100-300mg/d. Prevention 1. Active control of various vascular risk factors In view of the prevalence of embolism, etiological examination should be actively carried out. Those with a clear diagnosis should be treated with antithrombotic therapy. Antiplatelet agents alone or in combination have an important preventive role. 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.