An extravascular protective stent, comprising a booster (1), a hollow protective tube (2) and a hollow separator (4) all sequentially arranged the side wall of the protective tube (2) is provided with a protective notch parallel to the central axis of the protective tube (2) and extending through the two ends of the protective tube (2) the side wall of the separator (4) is provided with a separating notch extending through the two ends of the separator (4) the protective notch and the separating notch are symmetrically arranged in a straight line. During use of the separator (4) and the protective tube (2) when an internal carotid artery is exposed after a common carotid artery bifurcation is separated via a submandibular incision, the separator (4) and the protective tube (2) wrap the internal carotid artery, allowing the separating notch and the protective notch to face outward, and the closed wall to face inward and directly face the surgery direction, such that a surgeon can thoroughly excise diseased tissue in surgery and avoid hemorrhage caused by accidentally injuring the internal carotid artery during the surgery, and improve the surgical efficacy.La présente invention concerne un stent de protection extravasculaire, ledit stent comprenant un renforçateur (1), un tube de protection creux (2) et un séparateur creux (4), tous séquentiellement disposés la paroi latérale du tube de protection (2) est dotée dune rainure de protection parallèle à laxe central du tube de protection (2) et sétendant à travers les deux extrémités du tube de protection (2) la paroi latérale du séparateur (4) étant dotée dune rainure de séparation sétendant à travers les deux extrémités du séparateur (4) la rainure de protection et la rainure de séparation étant disposées de manière symétrique en une ligne droite. Durant lutilisation du séparateur (4) et du tube de protection (2) lorsquune artère carotide interne est exposée après la séparation dune bifurcation de lartère carotide p
