Abstract: In order to maintain food freshness, prevents the corruption and deterioration of the food, achieved the goal of lengthens the food shelf life,ofen used preservatives in food. But at present most chemistry preservatives we used is various to food bacteriostasis degree, also existence security trouble. Along with the people to the chemical synthesis food antiseptic safe understanding enhancement, low poisonous, is highly effective, widely and the economy practical organic food preservatives research and the development, will certainly to receive people's attention increasingly. In order to understand the organic presevatives in meat product application, We take the dried beef as the research object. But for the pollution bacteriacolony is extremely complex while dried beef is storing, we need combined-preservative to reach the effect of cooperation and strengthen. this practice mainly stady the Application characteristic of polylysine、natamycin, analyse the outcome of bacteriostasis through experiment，Ascertain the best matching ratio scheme. Take the cost and bacterium’s controllable in consideration,the results show that poly-L-lysine and Natamycin content was 0.4g/kg and 0.02g/kg in the experimental data which is the best option, it makes the products good quality and long shelf life.
Key words: Polylysine; Natamycin; Compoumd preservation; The best option
