Abstract: Dairy products starter culture plays a significant role in the dairy industry. For more scientific,efficient and economical use of dairy products starter culture,it is essential to have thorough understanding of these starters. Based on this statement,this paper summarizes the common types and probiotic function of dairy starter(Lactobacillus,Strptococcus,Bifidobacterium,Leuconostoc and Lactococcus),the factors affecting fermentation(selection of fermentation,phage and antibiotics)and cooperation fermentation(symbiosis and commensalism),in order to provide some references for its application in dairy products.