Abstract: The crude tea polysaccharide (CTPS) was eluted from DEAE-cellulose column by NaCl graded elution. The results showed that CTPS was composed of four components-one neutral polysaccharide and three acid polysaccharides (TPS Ⅰ. TPS Ⅱ、TPS Ⅲ) .After converting the hydrolyzed polysaccharides into acetylated aldononitriles by means of gas chromatography, the chemical components and the ratio were showed as follows: the neutral polysaccharides: D-Ara.: D- Ⅰ：D-Rha. :D-Man:D-Glu.:D-Gal.=0.48:0.56:1 .33. 1.00; TPS Ⅲ：D-Rha.: D-Ara. :D-Xyl.:D-Gal.=5:2:1.7.All these could be used for further study into the mechanism of antibloom of chocolate.

Key words: Tea Ploysaccharide Gas Chromatography Antibloom