Disclosed is a cystic cavopulmonary device for assisted circulation, the device comprising a shell, an inflow pipe (6) and an outflow pipe (4). A blood storage cavity (A) and a power cavity (B) are disposed in the shell, and the power cavity (B) is used to provide power for contraction and relaxation to the blood storage cavity (A). The inflow pipe (6) is disposed at a position, corresponding to the power cavity (B), on the shell, and an outer end thereof is used for connecting to the vena cava, and an inner end thereof is connected to the blood storage cavity (A) after passing through the power cavity (B). The outflow pipe (4) is disposed at a position, corresponding to the blood storage cavity (A), on the shell, and an outer end thereof is used for connecting to the pulmonary artery, and an inner end thereof is connected to the blood storage cavity (A). The circulation device can assist with single ventricular cavopulmonary circulation, implement the actions of repeatedly drawing and pumping blood, provide the power required for a patient's pulmonary circulation, and restore a biventricular blood flow in the body； and since the arrangement of the inflow pipe occupies the space inside the power cavity, the internal structure of the circulation device is more compact and the overall volume is smaller, and power from the power cavity can be fully utilized.Ce dispositif d'assistance de circulation de cavité pulmonaire en forme de poche comprend un boîtier, un tuyau d'entrée (6) et un tuyau de sortie (4), une cavité de réserve coronaire (A) et une cavité dynamique (B), laquelle sert à exercer une force de compression et de dilatation sur la cavité de réserve coronaire (A). Le tuyau d'entrée (6) est disposé sur le boîtier en correspondance avec la cavité dynamique (B), l'extrémité externe servant à entrer en communication avec les veines caves et l'extrémité interne entrant en communication avec la cavité de stockage (A) de sang après avoir pénétré la cavité dynamique (
