An operation device of a precise stent implantation system for a branch vessel. A stent comprises a body portion (21) and an opening portion (22) located at a rear end of the body portion (21). The precise stent implantation system comprises a guide core (11) coaxially provided in the stent and used for transporting same, a first guide sheath (12) connected to the guide core (11) and used for accommodating the body portion (21), a second guide sheath (13) for accommodating the opening portion (22), and a top core (14) provided in the second guide sheath (13) and abutting against the rear end of the opening portion (22)； the rear end of the first guide sheath (12) and the front end of the second guide sheath (13) are open. The operation device comprises a handle push-pull mechanism for transporting and contracting the guide core (11), the top core (14), the first guide sheath (12), and the second guide sheath (13), and a housing (31) used for accommodating the handle push-pull mechanism and provided with a fastening member for connecting or separating from the handle push-pull mechanism. The handle push-pull mechanism of the operation device transports or contracts the guide core (11) for transporting the stent, the top core (14), the first guide sheath (12), and the second guide sheath (13) by means of pushing and pulling so as to implement precise stent implantation of the branch vessel.L'invention concerne un dispositif d'actionnement d'un système d'implantation précise de stent pour un vaisseau ramifié. Un stent comprend une partie corps (21) et une partie d'ouverture (22) située à une extrémité arrière de la partie corps (21). Le système d'implantation précise de stent comprend un noyau de guidage (11) disposé de manière coaxiale dans le stent et utilisé pour le transporter, une première gaine de guidage (12) reliée au noyau de guidage (11) et utilisée pour recevoir la partie corps (21), une seconde gaine de guidage (13) pour recevoir la partie d'ouverture (22),
