Abstract: In the paper geniposides were used as raw materials.They were immersed with distilled water and then xanthein was extracted.Several frequently-used additives in food were added and the steadiness of xanthein in geniposide was studied.Some characters of coloring matters such as anti-oxidation talergnces light endusance and acid fastness were researched.

Key words: Geniposied Xanthein Extract steadiness