A composition is used for prevention or treatment of bacterial vaginosis (BV) and regulation of vaginal immunity and said composition with effective amount is selected from the groups comprising Lactobacillus rhamnosus GMNL-680 and Lactobacillus plantarum GMNL-682; the composition of the present invention is used to prevent and treat bacterial vaginosis by inhibition of the growth of pathogens and regulation of the expression of immunoregulators and is prepared in the forms of pharmaceutical compositions, food or other combinations thereof.