In this study, 12 strains of lactic acid bacteria are isolated from 30 samples of pickles by using the quantitative method of lactic acid presented in fermented juice. In which, two strains with high lactic acid production capacity are selected and identified, namely Strain LI (0,0045 g) of Leuconostoc and strain L2 (0,0063 g) of Pediococcus. The study also explores the factors affecting the ability to produce lactic acid of these two strains. The study’s results show that these two strains grow well when the salinity ranges from 4 - 6%, the temperature is from 25 - 30°C, the pH is of 6, the fermentation time is from 3-4 days. In addition, the fermented juice content of lactic acid should be from 0,06 to 0,2 g to help pickles have a delicious flavor.