Abstract :The fermentation properties and bioactive function of 2 new Lacto bacteria which were isolated from rural yogurt have been studied in this article. 6 strains have been obtained from the collected rural yogurt by using agar plate with special isolation medium of lactic acid bacteria. To research deeply we tested the six bacteriums fermentation performance. Because of the long fermentation period of the Min and Meng, screened reactivater of the two for decurtating the fermentation period and improving the fermentation rate and the quality of the texture .The result of the experiment indicated that the fermentation rate and the quality of the texture were improved when potato juice and tomato juicewas added during the milk fermentation.