▎ 摘　　要

NOVELTY - Polyvinyl alcohol gelatin starch hydrogel comprises 10-15 pts. wt. polyvinyl alcohol, 3-6 pts. wt. gelatin, 5-10 pts. wt. starch, 5-8 pts. wt. chitosan, 0.1-0.3 pts. wt. graphene oxide, 0.8-1.2 pts. wt. glycerin, and 40-50 pts. wt. water. USE - Polyvinyl alcohol gelatin starch hydrogel. ADVANTAGE - The polyvinyl alcohol gelatin starch hydrogel has good compatibility of each component, good film-forming property, excellent biological degradability, tensile strength, elongation at break and tear strength, mechanical property and swelling degree. The raw material of the invention is wide in source, simple in preparation method and suitable for mass production. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of the polyvinyl alcohol gelatin starch hydrogel, which involves mixing polyvinyl alcohol, graphene oxide and water to obtain the first mixed solution, mixing the first mixed solution, starch and gelatin to obtain the second mixed solution, mixing and casting second mixed solution, chitosan and glycerol into a film, and performing freeze-thaw treatment to obtain a polyvinyl alcohol gelatin starch hydrogel.