Atrial septal stoma device

The utility model relates to the technical field of medical instruments, and particularly discloses an atrial septal stoma device which comprises a first sheath tube, and the far end of the first sheath tube is connected with a supporting piece. The second sheathing canal sleeves the first sheathing canal, and the far end of the second sheathing canal is connected with a cutting assembly; the handle assembly is connected with the near ends of the first sheathing canal and the second sheathing canal and used for controlling axial movement of the first sheathing canal relative to the second sheathing canal so as to drive the supporting piece to be away from or close to the cutting assembly. According to the arrangement, the supporting piece can penetrate through the pre-opening hole in the atrial septum before the atrial septum tissue is cut, and the supporting piece in the contraction state and the cutting assembly can clamp the atrial septum tissue needing to be cut through movement of the first sheath tube;