Matters to be noted after carotid endarterectomy include: 1. After endarterectomy of carotid artery, there will be stripping surface of the vascular surface, and it is necessary to prevent local thrombosis on the stripping surface, and to use antiplatelet drugs to prevent platelets from aggregating on the stripping surface of carotid endarterectomy to produce thrombus; 2. Prevent over-perfusion of the brain caused by excessive increase in blood supply due to carotid artery stenosis, which will induce cerebral edema or cerebral hemorrhage and other related complications; and 3, Preventing the combination of contralateral cerebrovascular, intracranial cerebrovascular, coronary artery and other vascular complications after carotid endarterectomy. While actively checking and closely observing, we should prevent coronary artery and other cerebral vessels with medication; 4. We should pay attention to observing whether the patient has any local neurological symptoms, systemic neurological symptoms, local wound bleeding, and at the same time, we should see whether the patient’s blood pressure and heart rate are stable, and whether there are other cardiovascular accidents and cerebrovascular accidents.