The experiment shows that puffed food is delicious, but it belongs to food with high fat, high calorie and low crude fiber in terms of composition and structure. From the analysis of diet structure, there are certain defects and you can only eat it occasionally. Long-term consumption of puffed food will lead to high intake of oil and calories and insufficient intake of crude fiber. If you don't exercise enough, it will cause fat accumulation and obesity. Children eat a lot of puffed food, which will affect their normal diet, lead to a variety of nutrients can not be guaranteed and supplied, and easily lead to malnutrition. Puffed foods are generally high in salt and monosodium glutamate, which makes children easily lead to hypertension and cardiovascular diseases in adulthood. The main problem of unqualified puffed food products is bacterial pollution, such as excessive coliform bacteria, which will lead to gastrointestinal discomfort, diarrhea and liver damage in children.