The invention relates to a hovenia acerba and ginseng effervescent tablet which comprises the following components: 5-8% of black sea cucumbers, 8-15% of hovenia acerba, 20-25% of citric acid, 18-22% of sodium carbonate/sodium carbonate (1:9), 30-40% of lactose/mannitol (10:1) and a proper amount of corrigent and PEG6000. A preparation method of the hovenia acerba and ginseng effervescent tablet comprises the following steps: drying the components, crushing, screening, preparing a soft material, pelletizing, drying, and tabletting. The hovenia acerba and ginseng effervescent tablet prepared with the preparation method provided by the invention is qualified in hardness, complete in disintegration, tidy in appearance, relatively good in taste and high in dependency; the preparation method provided by the invention is simple and convenient, and the obtained product is qualified and applicable to large-scale production; the hovenia acerba and ginseng effervescent tablet provided by the invention has effects of dispelling the effects of alcohol, protecting the liver and the like.