Monascus red color is the product of monascus rice after fermentation. In fact, it is a kind of food additive and a safe natural additive allowed to eat in China. It can make food turn red to increase people's appetite, and it is harmless to human body. At the same time, it also has the characteristics of "nutrition, nature, multi-function".Monascus red is the only natural food pigment fermented by microorganisms in the world, and it has a wide range of uses. The results show that Monascus pigment has good thermal stability, superior to other synthetic pigments and excellent heat resistance in natural pigments. Not affected by common metal ions, oxidants and reducers.