A double-balloon tracheal cannula structure comprises a patient end joint (1), a small balloon (2), a big balloon (3), a strengthening aeration pipe (4), a connecting piece (5), a gas source joint (6), a inflating pipe (7) and a pressure indicator (8). An approximately elliptical big balloon (3) matched with a human throat is positioned on the strengthening aeration pipe (4). The big balloon (3) is composed of a component a (3-1) and a component b (3-2). The component b (3-2) has two different forms: the component b (3-2) in a form of an integral structure, and the component b (3-2) consisting of a component c (3-3) and a component d (3-4) adhered together. One end of the component a (3-1) is provided with a ring groove (3-10), connected smoothly with the front opening of the component b (3-2), and integrated with the component b as a whole by an adhesive. The big balloon (3) is from 5cm to 10Cm in diameter, and is made of medical silicon rubber. The double-balloon tracheal cannula can effectively control the position where the tracheal cannula is inserted into the throat, in order to prevent the blood, secretion, foreign matter and the like in the operation process from getting into the deep place of the throat to block the air passage or get into the esophagus, so as to keep the respiratory tract unimpeded and improve the operation safety.Linvention concerne une structure de canule trachéale à deux ballonnets qui comprend un joint terminal côté patient (1), un petit ballonnet (2), un gros ballonnet (3), un tuyau daération de renforcement (4), une pièce de connexion (5), un joint de source de gaz (6), un tuyau de gonflage (7) et un indicateur de pression (8). Un gros ballonnet approximativement elliptique (3) adapté à une gorge humaine est placé sur le tuyau daération de renforcement (4). Le gros ballonnet (3) est composé dun composant a (3-1) et dun composant b (3-2). Le composant b (3-2) a deux formes différentes : le composant b (3-2) en forme de structure intég
