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 A great extent of past work has focused on the development of stimuli-responsive hydrogels that can primarily achieve a two-state transition, such as sol-gel translation. In the current work, a reversible hydrogel with three-state transition is designed. The three transformations between original, oxidized, and reduced states are achieved via controlling the external stimuli conditions. Hydrogels in their original state possess a weak self-healing property and negligible fluidity. The oxidized state hydrogel can keep molding, however, losing the self-healing property. In contrast, the reduced state hydrogels exhibit strong self-healing property. Moreover, the hydrogel becomes injectable subsequent to dithiothreitol addition. Thereafter, under UVlight irradiation or NaClO immersion, the hydrogels can be remolded to any desired shapes. These properties provide novel designing strategies and potential applications for smart and reusable materials