[Objective]The research aimed to study the effects of 30 kinds of Chinese herbs on bacteria in food. [Method]30 kinds of Chinese herbs and 3 usual bacteria in foods were used for experiment material. And the effects of water,ethanol absolute and petroleum ether extracts on bacteria were studied using the filter paper method. [Result]The results showed that the water extracts of Coptis chinensis Franch. ,Rheum officinale Baill. ,Magnolia officinalis Rehd. et Wils. and Syzygium aromaticum Thunb. ,the ethanol ...