Based on the metabolic pathway of Monascus,the effects of some chemical materials on yellow pigments and citrinin production by Monascus anka mutant have been researched in this paper.The results indicated that biotin,calcium acetic acid and zinc acetic acid were benefit for yellow pigments production by Monascus anka mutant.Whatever how much and early or later of the caprylic acid addition,it has obvious bad influence on yellow pigments production and the growth of Monascus anka mutant,but caprylic acid has good influence on red pigmen...