Saccharide composite polyacrylamide hydrogel as well as preparation method and application thereof

The invention discloses saccharide composite polyacrylamide hydrogel as well as a preparation method and application thereof. The preparation method comprises the following steps: adding a certain amount of polysaccharide, an initiator and a cross-linking agent into an acrylamide aqueous solution, stirring the mixture for dissolving, transferring the mixture into a glass mold, and initiating polymerization by utilizing ultraviolet light to prepare the polysaccharide composite polyacrylamide hydrogel. The hydrogel has high elasticity: after the hydrogel is stretched to 20 times of the originallength and tension is released, the hydrogel can still recover quickly; the hydrogel has high toughness, no damage trace is generated when the gel is punctured to 95% of deformation, and in a tearingtest, a notch of 1 mm in the edge of the gel is still kept unchanged after being stretched for 10,000 times in a reciprocating manner; freezing resistance is achieved, and high flexibility can still be kept under the condition