A polyethylene glycol (PEG)-supported NADH model as a novel organic reductant was designed and synthesized. The reductions of various α,β-unsaturated ketones by the PEG-supported NADH model were examined,and the results showed that the reductions completely and quickly proceed with no catalyst at ambient temperature. The main advantages of this liquid-like PEG-supported NADH model are easy workup,and an optimal potential for recycling use and solvent-free for use in reactions.