1) fried food after frying, deep-frying, baking and other high-temperature processing, easy to produce a toxic, potentially carcinogenic chemical substances - acrylamide, and as the temperature rises, its content also increases, long-term consumption of people will appear drowsy, mood and memory changes, hallucinations and tremors, etc., accompanied by sweating, muscle weakness and other peripheral neurological disorders, can also be cause chronic poisoning of the nervous system. (2) Deep-fried food is often hard outside and uncooked inside, containing pathogenic microorganisms and prone to intestinal parasites and other diseases. (3) Lead content and copper content are seriously excessive, excessive intake of lead will be harmful to the human body. (4) Induce diseases. Fried food fat content, not easy to digest, often eat fried food will cause indigestion, fullness in the chest after a full meal, or even nausea, vomiting, diarrhea, loss of appetite and so on. Easy to fire, constipation, fried food containing high fat, can stimulate the gastrointestinal mucosa, induced biliary spasm, is very harmful. (5) Produce toxic and harmful substances. Fats and oils repeatedly heated at high temperatures will produce harmful substances, resulting in polymers, more toxic, most fried, baked foods, eat a lot of harm to the human body. (6) Nutritional elements are seriously damaged, causing slow reaction. Food fried at high temperatures, high temperature so that the protein frying deterioration and reduce the nutritional value of high temperature will also destroy the fat-soluble vitamins in food, such as vitamin A, carotene and vitamin E, hindering the human body on their absorption and utilization.