Disclosed are a puncturing system and method used for transcatheter puncture of interventricular septum. The puncturing system comprises a puncture needle (1) made of nickel-titanium memory alloy and a puncture sheath (3) in a hollow tube shape. The puncture needle (1) comprises a tip (11) and a tail (12). An operating handle (2) is connected to the tail (12) of the puncture needle (1). The tip (11) of the puncture needle (1) is pre-arranged to be smoothly curved, so that the tip (11) of the puncture needle (1) is smoothly curved and the hardness of the tip increases when the temperature of the puncture needle (1) is greater than the phase transition temperature, and the hardness of the puncture needle (1) decreases when the temperature of the puncture needle (1) is lower than the phase transition temperature. The sheath (3) allows the puncture needle (1) to penetrate freely, and is bent in a corresponding shape at a position corresponding to the tip (11) of the puncture needle (1). The puncture needle (1) used is made of memory alloy； when the temperature of the puncture needle (1) is greater than the phase transition temperature, the hardness and the bending angle of the tip (11) of the puncture needle (1) are automatically changed to facilitate puncturing the interventricular septum.La présente invention concerne un système de perforation et un procédé utilisé pour la perforation par trans-cathéter de septum inter-ventriculaire. Le système de perforation comprend une aiguille de perforation (1) constituée d'un alliage à mémoire de forme en nickel-titane et une gaine de perforation (3) sous une forme de tube creux. L'aiguille de perforation (1) comporte une pointe (11) et une queue (12). Une poignée d'actionnement (2) est reliée à la queue (12) de l'aiguille de perforation (1). La pointe (11) de l'aiguille de perforation (1) est pré-agencée afin d'être incurvée de manière lisse, de sorte que la pointe (11) de l'aiguille de perforation (1) est incurvée de manière l
