The research advance in the harm of benzoic acid to the body ,the source of it in raw milk and in factors influencing the content of benzoic acid such as hygienic quality of raw milk,the content of hippuric acid,anthropic addition were summarized in the paper.ln addition,this paper discussed the methods how to cntrol the content of benzoic acid in raw milk including improving the hygienic quality of raw milk,se- cure and nontoxic antisepti...