Abstract: Forty\|five lactic acid bacteria were screened from the samples collected from the high， cold pasture areas in Xinjiang， and three of them with antimicrobial properties were screened out through the test. After exclusion of organic acids and catalase， these three lactic acid bacteria still had a certain bacteriostasis performance. Meanwhile， the antibacterial activity was greatly reduced after treated with trypsin， which indicated that the metabolite was bacteriocins， the protein with antibacterial property. These three lactic acid bacteria were identified to be: Lactobacillus plantarum， Lactobacillus pentosus and Lactococcus lactis，respectively．

Key words: Xinjiang, low\|temperature lactic acid bacteria, bacteriocin