The principle and treatment policy of cerebrovascular treatment is to improve the blood circulation in the cerebral ischemic area and promote the recovery of neurological function as soon as possible. In general, cerebrovascular disease can easily progress and worsen within 24 hours of the onset of the disease. Within the time window of thrombolysis, that is, within 4.5-6 hours of the onset of the disease, if there are indications for thrombolysis, thrombolytic therapy can be given to dissolve the thrombus in the blood vessel to achieve the purpose of revascularization, which can significantly improve the symptoms of unfavorable left hemiplegia; if the time window of thrombolysis is missed, treatment should also be actively given to save the left hemiplegia. If the time window of thrombolysis is missed, active treatment should be given to save the ischemic hemithorax. Commonly used programs include anticoagulation, fibrin-lowering, antiplatelet aggregation, cerebral protection and other treatments; severe cerebral edema can also be treated with mannitol dehydration and cranial pressure reduction to improve cerebral metabolism.