Abstract: The optimum extracting conditions and production of red pigment in Lycium barbarum were studied by orthogonal test L 9 (34). And the stability of the red pigment was analyzed. Results show that: (1) the high production was obtained under the conditions of 90℃, 85% ethanol, 1∶4 the ratio, 1 times/1.5h, total 3 times by Suo Extraction Installation; (2) The red pigment was water-soluble, resistant to light, heat, acid, reducer, and common food additives. So it ’s a kind of natural plant pigment used extensively in food, beverage and medicine etc.

Key words: Lycium barbarum, red pigment, orthogonal test, extraction, stability