An anti-shrinkage device used for a conveyor and a conveyor thereof, wherein the anti-shrinkage device (1) is sleeved on a sheath core tube (4) of a conveyor (100) and is located between an end head (5) of the conveyor (100) and a push rod (3); the anti-shrinkage device (1) comprises at least two hollow anti-retraction members (11), and the at least two anti-retraction members (11) are arranged at an interval along the length direction of the sheath core tube (4); the anti-shrinkage device (1) further comprises a connection member (12) that connects any two adjacent anti-retraction members (11) among the at least two anti-retraction members (11). When an implant is released, the anti-retraction members (11) are in contact with an inner surface of the implant, which increases the frictional force received by the implant, thus the implant does not easily move during the withdrawal of a sheath (2), and the shrinkage of the implant is prevented, achieving the safe and smooth release of the implant; meanwhile, the accuracy of clinical operation determination is improved.L'invention concerne un dispositif antiretrait utilisé pour un transporteur et un transporteur associé, le dispositif antiretrait (1) étant emmanché sur un tube gaine-noyau (4) d'un transporteur (100) et situé entre une tête d'extrémité (5) du transporteur (100) et une tige de poussée (3) ; le dispositif antiretrait (1) comprend au moins deux éléments antiretrait creux (11), et lesdits au moins deux éléments antiretrait (11) sont disposés à un intervalle dans la direction de la longueur du tube gaine-noyau (4) ; le dispositif antiretrait (1) comprend en outre un élément de liaison (12) qui relie deux éléments antiretrait (11) adjacents parmi lesdits au moins deux éléments antiretrait (11). Lorsqu'un implant est libéré, les éléments antiretrait (11) entrent en contact avec une surface interne de l'implant, ce qui augmente la force de frottement reçue par l'implant, de sorte que l'implant ne se déplace pas