The product is a new food preservative, can effectively inhibit the growth of bacteria, mold and yeast with no undesirable impact for food. It can involve in demic metabolism and finally be oxidized into water and carbon dioxide, does not accumulate in the human body. It can be seen from this that it has high security, is internationally recognized as the safety of food additives, because its toxicity is only  half of salt, 1/ 40 of sodium benzoate. Sorbic acid has been approved of using in worldwide and successfully used in the food industry in many ways. It has obvious inhibition of molds, yeasts and aerobic bacteria, whose inhibition of growth effect is more effective than bactericidal effect. It conbines with sulfhydryl group in microbial enzyme system to destroy the role of enzymes, so that achieving the  bacteriostasis and preservation purposes. It also can prevent from the growth and breeding of botox, staphylococcus and salmonella and other harmful microorganisms. Under acidic condition (pH value less than 5-6), the effect of bacteriostasis is better, and the food composition has no any impact of preservative effection, so it effectively extends the storage time of food and keep the original flavor of food. However, their is no effect of anaerobic bacteria Bacillus and Lactobacillus acidophilus and other beneficial micro-organisms. It also can be used for the medicine industry, light industry, cosmetics manufacturing. Besides, as an  unsaturated acid, it can be used in resins industry, spices industry, rubber industry, etc.