A left ventricle volume reduction device, comprising: a support frame (1) formed from a shape memory alloy, and a polymer membrane (2) covering the support frame (1) when the support frame (1) is released inside a left ventricle (3) from a cardiac apex (31) of the left ventricle (3), the shape of the support frame (1) after release fits to the inner wall of the left ventricle (3). An end of the support frame (1) away from the cardiac apex (31) is provided with a support end (11) extruding outward, and the support end (11) is attached on the inner wall of the left ventricle (3). An end of the support frame (1) close to the cardiac apex (31) is provided with a connection sleeve (5) detachably connected to a push rod (4). The left ventricle volume reduction device can isolate a non-functioning ventricle region of the left ventricle, reduce diastolic and systolic volume and left ventricle tension, and improve left ventricle reconstruction and cardiac function of a patient with heart failure. The device adopts an intervention path and provides a minimally invasive trans-cardiac apex (31) design to reduce trauma to minimum. The design reduces a diameter of a delivery sheath tube (9) in the trans-cardiac apex (31) path or an intervention path, avoiding the risk of damage to blood vessel and heart valves. The present invention adopts designs such as a locating base (6) and a cardiac apex locator (7), has a good locating function and strong fitting tension.Linvention concerne un dispositif de réduction de volume du ventricule gauche comprenant un cadre de support (1) en alliage à mémoire de forme, lequel est recouvert dun film polymère (2). Lorsque le cadre de support est libéré dans le ventricule gauche (3) depuis lapex du coeur (31) du ventricule gauche (3), sa forme sadapte à la paroi interne du ventricule gauche (3), une extrémité du cadre de support (1) distante de lapex du coeur (31) présente un segment (11) de support sétendant vers lextérieur, lequel segment (11) sim
