Following the isolation and identification of Lonicera Caerulea,the stability of Cyanindin-3-glucoside（anthocyanins）was studied in detail.The results show the pigment would be better dissolved in water and ethanol and tastes good.The pigment becomes red in acidic solution,violet red in weak acidic or neutral solution,and blue in basic solution.The pigment is resistant to heat.The color of pigment becomes strong with adding of vitamin C,cane sugar and starch.The pigment would be degradated by light and hydrogen peroxide.Metal ion(except Fe3+)had no bad effect on the color of the pigment.
