[Objective] The purpose was to study the extraction of tea pigment from low-grade green tea and confirm its optimum extraction technology.[Method] The tea pigment was extracted from tea leaves by organic solvent.With the yield of tea pigment as index,extraction time,ethanol concentration and pH value of solution were conducted for orthogonal experiment with 3 factors and 3 levels to optimize technical conditions.The light and heat stability of the tea pigment was analyzed through solubility and stability ex...