The invention relates to a novel epigallocatechin gallate 3 polymer and an u03b1 - glucosidase blocker containing the epigallocatechin gallate polymer. By u03b1 - glucosidase blocking effect, it can inhibit the decomposition of starch and polysaccharide from diet, and inhibit the absorption. By adding u03b1 - glucosidase blocker to drink food, we can provide excellent u03b1 - glucosidase blocking effect, and aim to inhibit sugar absorption and prevent diabetes drink food for a long time.本發明係新穎的表沒食子兒茶素沒食子酸酯3聚物，及含表沒食子兒茶素沒食子酸酯聚合物之α-葡萄糖苷酶阻斷劑。藉由α-葡萄糖苷酶阻斷作用，抑制來自飲食的澱粉、多醣之糖分的分解，而可抑制吸收。藉由將α-葡萄糖苷酶阻斷劑添加於飲食品等，可提供具有優異的α、葡萄糖苷酶阻斷作用，且目的為抑制糖吸收進而長期性的預防糖尿病之飲食品。
