▎ 摘　　要

NOVELTY - Preparing three-dimensionalself-deforming double-network hydrogel in one step using a light absorber comprising (i) preparing polyelectrolyte/acrylamide precursor solution containing UV absorber, (ii) according to the needs of different three-dimensional configurations, covering pre-designed photo-mask on the surface of the glass mold, injecting the polyelectrolyte/acrylamide precursor solution into the glass mold, subjecting glass mold to unidirectional or bidirectional irradiation with 365 nm UV lamp for 3-4 hours to obtain anisotropic polyelectrolyte/poly-acrylamide double network hydrogel and (iii) taking the polyelectrolyte/poly-acrylamide double network hydrogel obtained in step (ii) out of the glass mold, which will spontaneously transform into a pre-designed three-dimensional configuration in air to obtain final product. USE - The method is useful for preparing three-dimensional self-deformation double-network hydrogel. ADVANTAGE - The method: simple, can construct various complex three-dimensional configuration, and provides theoretical guidance and technical reference for development of the three- dimensional self-deformation hydrogel.