A double-chamber blood storage unit comprises a first blood storage chamber and a second blood storage chamber. The first blood storage chamber and the second blood storage chamber are communicated with each other through a pipeline connecting device, the first blood storage chamber is provided with a first chamber, the first chamber is provided thereon with a left ventricular suction pipeline communicated with the inner cavity of the first chamber, and the left ventricular suction pipeline is used for storing sucked intracardiac blood in the first chamber. The second blood storage chamber is provided with a second chamber, the second chamber is provided thereon with a right ventricular suction pipeline communicated with the inner cavity of the second chamber, and the right ventricular suction pipeline is used for storing, in the second chamber, the blood originating from right ventricular suction. The pipeline connecting device is arranged between the first blood storage chamber and the second blood storage chamber, the first blood storage chamber and the second blood storage chamber are used to respectively store human bloods generated in different surgical environments, and a connecting tube is opened or closed through a channel valve on the pipeline connecting device. The double-chamber blood storage unit is simple in structure and convenient to use, and can ensure that the blood in thoracic chamber can be safely and effectively recycled to body blood during surgery.Linvention concerne une unité de stockage de sang à deux chambres, qui comprend une première chambre de stockage de sang et une seconde chambre de stockage de sang. La première chambre de stockage de sang et la seconde chambre de stockage de sang sont en communication lune avec lautre par lintermédiaire dun dispositif de raccordement de conduite, la première chambre de stockage de sang comprend une première chambre, la première chambre est située sur celle-ci avec une conduite daspiration ventriculai
