Vacuum sealed packaging box for frozen food achieves long-term preservation of food through vacuum sealing technology, which can effectively prevent food from being frozen due to temperature fluctuations and maintain the original flavor and texture of the food. The vacuum environment reduces the oxygen content, inhibits the growth of bacteria and mold, and prolongs the shelf life of food. By isolating air and moisture, the packaging box can effectively retain the nutrients of food and reduce the loss of nutrients caused by oxidation reactions. It has strong sealing performance, effectively prevents cross contamination between different foods, ensures food safety, and the materials used can remain stable at extreme temperatures, suitable for refrigerated and frozen environments.