▎ 摘　　要

NOVELTY - Preparing composite hydrogel comprises adding graphite oxide into ion liquid, ultrasonically dispersing to obtain graphene oxide ion liquid solution, then adding cellulose in ion liquid solution to obtain cellulose ion liquid solution, adding reducing agent in graphene oxide ion liquid solution, carrying out reduction oxidation to obtain mixture of ionic liquids, uniformly mixing obtained mixture of ionic liquids, cellulose ion liquid solution and graphene to obtain mixed solution, defoaming the obtained mixed solution, and regenerating using coagulation bath, and then washing. USE - The method is useful for preparing composite hydrogel. ADVANTAGE - The method is capable of preparing composite hydrogel with improved machinery property. DETAILED DESCRIPTION - Preparing composite hydrogel comprises adding graphite oxide into ion liquid, ultrasonically dispersing to obtain graphene oxide ion liquid solution, then adding 4-6 wt.% of cellulose in the solution to obtain cellulose ion liquid solution, adding reducing agent into graphene oxide ion liquid solution, carrying out reduction oxidation at 80-100 degrees C for 2-24 hours to obtain mixture of ionic liquids, uniformly mixing obtained mixture of ionic liquids, cellulose ion liquid solution and graphene to obtain mixed solution, defoaming the obtained mixed solution, and regenerating using coagulation bath, and then washing. An INDEPENDENT CLAIM is included for the composite hydrogel obtained by the method.