Carotid artery stenosis is a major risk to cerebrovascular health. Clinically, carotid endarterectomy ( CEA ) and carotid angioplasty and stenting ( CAS ) are mainly used to treat carotid artery stenosis. According to CREST research results, there was no significant difference between CAS and CEA in 30-day mortality, 4-year homolateral stroke incidence, disabling major stroke incidence, etc. However, CAS has lower incidence rate than CEA on myocardial infarction and cranial nerve palsy. The CAVATAS study suggests that CEA and CAS have similar efficacy and safety, and minor complications can be decreased by endovascular therapy.