Fresh-keeping device

The utility model discloses a fresh-keeping device which comprises a fresh-keeping container and a butt joint assembly, a containing inner cavity is formed in the fresh-keeping container, and an air inlet port communicated with the containing inner cavity is formed in the side wall of the fresh-keeping container; the butt joint assembly comprises an air outlet port, an insertion port and a guide part, the air outlet port communicates with the conveying pipeline, the insertion port is connected to the air outlet port, the guide part is located on the outer side of the insertion port, and a guide face gradually expanding outwards in the direction away from the air outlet port is formed on the inner side of the guide part; the guide surface is beneficial to improving the accuracy of connection between the air outlet port and the air inlet port, cold air is conveyed into the containing inner cavity from the air inlet port, the air outlet port and the inserting port, the containing inner cavity is filled with the