Abstract:The general purpose of food processing is that food nutrients in the digestion and absorption of the human body， kill pathogenic microorganisms and parasites， eliminate and destroy toxins harmful to the body， passivation of enzymes and active substances to facilitate the preservation of food， and maintain or improve organoleptic properties， making it more suitable and meet the needs of human nutrition and sensory. In this pa－ per， vacuum freezing， microwave heating， membrane and ultra-high pressure processing was been discussed from principle， advantages and disadvantages， suitable food and influence on food nutrients. So the direction and influence of food technology can be discussed.