In today’s society, with the continuous improvement of people’s living conditions, people’s requirements for the preservation of food bags are also constantly improving. I believe that everyone wants to eat fresh food every day, because fresh food tastes better, tastes more delicious, and is more beneficial to the health of the body. Therefore, the requirements for food bags are constantly increasing, because the quality of food bags determines the quality of food. So when screening food bags, how do we screen food bags for frozen food? What details need to be paid attention to in this process? In fact, when screening food bags, the food bag merchants have instructions in the detailed book. When purchasing, we must carefully read the detailed description of the food bag packaging to see if the food bag is suitable for use on frozen food. Of course, when screening food bags, we must also pay more attention to the material of the food bags, whether they are made of environmentally friendly materials for food bags, and whether there is any peculiar smell. Whether the manufacturer of the food bag is a reliable manufacturer or not, these are the more important details. If the manufacturer of the food bag is unreliable and has a bad reputation, then the purchased food bag must not be used.