A precise stent implanting system for a bifurcated vessel, the bifurcated vessel comprising a through main vessel (1), and a branch vessel (2) in communication with the main vessel (1)； the precise stent implanting system comprises a stent delivery device releasably housing a stent (6) and delivering the stent (6), a guide wire (4) extending from the main vessel (1) to the branch vessel (2), and a positioning guide wire (5) extending along the main vessel (1), the stent delivery device being movably sleeved on the guide wire (4)； the stent delivery device comprises a binding membrane (3) detachably wrapped around the periphery of the stent (6)； a limiting hole (7) is provided on the binding membrane (3) or on the stent (6), and the positioning guide wire (5) slidably passes through the limiting hole (7) so as to position the stent (6) axially and circumferentially. The stent (6) is stopped at the opening of the branch vessel (2) by means of the positioning guide wire (5) passing through the limiting hole (7), so that the stent (6) can be precisely fitted to the opening portion, and the stent (6) can be released by unfolding the binding membrane (3) or removing the binding membrane (3) out of the body. Said implanting system has a simple structure and is easy to operate.L'invention concerne un système précis d'implantation d'endoprothèse pour un vaisseau bifurqué, le vaisseau bifurqué comprenant un vaisseau principal traversant (1) et un vaisseau ramifié (2) en communication avec le vaisseau principal (1) ； le système précis d'implantation d'endoprothèse comprend un dispositif de pose d'endoprothèse logeant de manière libérable une endoprothèse (6) et posant l'endoprothèse (6), un fil de guidage (4) s'étendant à partir du vaisseau principal (1) vers le vaisseau de ramification (2) et un fil de guidage de positionnement (5) s'étendant le long du vaisseau principal (1), le dispositif de pose d'endoprothèse étant emmanché de manière mobile sur le fil de guidage (4) ； le
