▎ 摘　　要

NOVELTY - Method for preparing three-dimensional graphene-based hydrogel material, involves reacting graphene oxide, reducing agent and gas dissolving additive in aqueous solution system, where the aqueous solution system is defoamed system. USE - Method for preparing three-dimensional graphene-based hydrogel material used in preparation of three-dimensional graphene-based aerogel and xerogel material (all claimed). ADVANTAGE - The method effectively avoids the appearance of holes in the graphene hydrogel, has high yield, and is simple, safe, environmentally-friendly and suitable for industrial application, and the prepared graphene-based hydrogel material has compact structure, avoids the phenomenon of internal structure collapse, improves the mechanical properties of graphene-based hydrogel, and broadens the application of graphene-based hydrogel.