Cold chain box based on liquid carbon dioxide filling technology

The utility model provides a cold chain box based on a liquid carbon dioxide filling technology, which comprises a box main body and a cold placing piece, and at least one side surface of the box mainbody is provided with an accommodating groove; a cross beam is arranged in the containing groove, the cross beam is parallel to the horizontal direction, the two ends of the cross beam are connectedwith the opposite side walls in the containing groove respectively, and the cross beam is flush with a groove opening of the containing groove; a first door body and a second door body are hinged to the side faces, and the first door body and the second door body cover the upper side and the lower side of the cross beam respectively so as to close the box body. The cold storage piece is arranged in the containing groove and is arranged above the cross beam, and the outer side wall of the cold storage piece abuts against the inner side wall of the containing groove; at least one cold placing groove is formed in the uppe