[Objective] The research aimed to study the structure of polysaccharides in potato pulp pectin.[Method] By using anion-exchange column for isolation and sephadex column for purification,GC,HPGPC,ultraviolet scanning and infrared spectrum,periodate oxidation and Smith degradation method and so on,the structure of polysaccharides in potato pulp pectin were evaluated.[Result] Polysaccharides in potato pulp pectin were composed of most acidic polysaccharide and a little neutral polysaccharide.The molecular weig...