Objective:To isolated and extracted Euphoria Longan(Lour.)Steud and Litchi chinensis Sonn polysaccharides from pulp of the Euphoria Longan(Lour.)Steud and the Litchi chinensis Sonn and analyse its effect on cleaning oxygen radical.Methods:A technique with hot water extract, ethanol sedimentation, chloroform and butanol combining sevag of enzyme deproteinization and decolored by H 2O 2 were preformed. Contents of sugar and polysaccharides of the Euphoria Longan(Lour.)Steud and the Litchi chinensis Sonn was...