Foam-leakage-preventing chamber connecting device and refrigerator

The invention provides a foam-leakage-preventing chamber connecting device and a refrigerator. The foam-leakage-preventing chamber connecting device is used for connecting a first chamber and a second chamber, and comprises an upper end part connected with the first chamber, a lower end part connected with the second chamber, and a cylindrical buffer chamber arranged between the upper end part and the lower end part. The cylindrical buffer chamber comprises a cylindrical shell connected with the lower end in a sealed mode and a buffer internal piece connected with the upper end in a sealed mode, wherein the buffer internal piece is arranged in the cylindrical shell, and a gap is formed between the top of the buffer internal piece and the top end of the cylindrical shell. According to the foam-leakage-preventing chamber connecting device, the buffer internal piece and the cylindrical shell form three material leakage buffer chambers in total, extrusion force generated in the foaming process can be relieved thr