Probiotic agent for inhibiting oral pathogenic bacteria and application thereof

The invention relates to a probiotic agent capable of inhibiting oral pathogenic bacteria and application of the probiotic agent. The bacterial strains in the probiotic agent capable of inhibiting the oral pathogenic bacteria comprise a streptococcus thermophilus ST36 bacterial strain and a lactobacillus acidophilus LA18 bacterial strain. The invention finds that the two strains have potential interaction, can cooperate with each other, and have synergistic interaction in the efficacy of inhibiting oral pathogenic bacteria and improving periodontitis, which is specifically reflected in that: the traditional Chinese medicine composition has an obvious inhibition effect on common oral pathogenic bacteria; the rat weight loss phenomenon caused by periodontitis and the secretion of gingival tissue inflammatory factors are improved; the colonization of oral pathogen porphyromonas gingivalis in the oral cavity is reduced. Under the condition that the using bacterium amount is consistent, compared with a single ST36