15 lactic acid bacteria strains were isolated from pickled food on the selective culture medium MRS,and preliminarily identified and screened in this paper.The susceptibility tests of lactic acid bacteria to five kinds of drugs were conducted by K-B method.The results showed that percentage of ampicillin resistance strains was 40% (6/15),one isolate was resistant to tetracin,one isolate was resistant to getamicin,one isolate was resistant to steptomycin and no isolate was resistant to cefotaxime.The conjugation tests of 8 resistant strains demonstrated resistant plasmids of 3 lactic acid bacteria strains can be transferred to recipient E.coli RG488.