In this article the antimicrobial activity of polylysine,the effect of temperature and pH condition on polysine antimicrobial activity,and the antimicrobial activity of combination with sodium diacetate,glycine and acetic acid were studied.The results indicated that polylysine had a wide antimicrobial spectrum and the minimum inhibitory concentrations for the growth of bacteria below 25 mg/L,and the minimum inhibitory concentrations for the growth of fungi below 200 mg/L.Polylysine was stable at high temper...