Abstract: By studying on the extraction and stability of pigment in chestnut kernel, it showed that the pigment belongs to fat- soluble pigment that extract it with aether solvent, the ratio of material and solvent 1:3, optimum temperature 35℃, 1.5h. The content of pigment in chestnut kernel is 2.8%, exists in the outer more than the inner, aid-extraction of microwave and ultrasound destruct the pigment; the most wavelength in the visible spectra is 441nm. Light, low temperature, ions, food additive, and browning enhance the stability of pigment, but Pb2+, pH, ultraviolet, and more than 100℃ affect the stability of pigment.

Key words: chestnut, pigment, extraction, stability