Low-temperature refrigerator capable of achieving double-layer sealing

The low-temperature refrigerator comprises a refrigerator body, a cabinet door is arranged on the upper surface of the refrigerator body, the end, located on the cabinet door, of the refrigerator body is of an opening structure, a first push-pull plate is arranged in the opening structure, a second push-pull plate is arranged on the lower surface of the first push-pull plate, and a groove is formed in the upper surface of the refrigerator body; grooves are formed in the upper portion of the refrigerator body, supporting rods are embedded in the grooves, a structure that a first push-pull plate and a second push-pull plate push and pull each other is arranged on the upper portion of the refrigerator body, and meanwhile a refrigerator door is arranged on the upper surface of the first push-pull plate and the upper surface of the second push-pull plate. In this way, a double-layer sealing structure is achieved under the action of the cabinet door, the first push-pull plate and the second push-pull plate, and the