In this study, different doses of konjac gum powder (KGM) were administered to Kunming mice to study their the anti-drunk hangover effects and its mechanism, and the model was made by intragastric administration of 56 %vol liquor of Red Star Erguotou, China. The results showed that the middle dose (240 mg/kg) and high dose (400 mg/kg) of KGM could effectively prolong the climb time and Latency time of drunkenness, and could significantly shorten the drunken mice sleeping time and sobering time. The ethanol concentration of serum in the high and middle dose groups was significantly lower than that in the model group, and the contents of alcohol dehydrogenase (ADH), aldehyde dehydrogenase (ALDH) and cytochrome P450 (P450) in liver homogenate significantly increased in high dose group. The contents of malondialdehyde (MDA) in gastric mucosal tissues and serum in the middle and high dose groups significantly decreased, while the activities of superoxide dismutase (SOD), nitric oxide (NO) and prostaglandin E2 significantly increased. The anti-alcohol hangover mechanism of KGM might be as follows. On the one hand, alcohol absorption was inhibited by the KGM and the ethanol concentration in serum is reduced. On the other hand, the decrease of MDA content, and the increase of SOD activity, NO and PGE in gastric mucosa and serum decreased the damage of gastric mucosa, and increased the ADH, ALDH, P450. Thusand the alcohol metabolism was accelerated through alcohol dehydrogenase and ethanol oxidase system, then its anti-drunk hangover role was played.