The invention relates to a ginger tea slimming tablet and a preparation method thereof. The ginger tea slimming tablet is prepared from the following raw materials in parts by weight: 5-6 parts of fructus hippophae, 2-3 parts of the root of kudzu vine, 4-5 parts of seville orange flower, 2-3 parts of smoked plum, 3-4 parts of sealwort, 5-7 parts of lotus leaf, 2-3 parts of Streptopus obtusatus Fassett., 1-2 parts of combretum, 3-4 parts of soda water, 10-12 parts of crab meat, 18-19 parts of Chinese yam, 5-7 parts of malt, 20-22 parts of fresh ginger, 8-9 parts of laver powder, 10-11 parts of peanut meal, 8-9 parts of glucose, 2-3 parts of tea-seed oil, 15-20 parts of runner bean meal, 18-20 parts of black tea powder, 4-5 parts of honey, 24-25 parts of maltodextrin, 1.1-1.2 parts of magnesium stearate, 40-50 parts of table vinegar and 8-9 parts of nutrition additive. When the added traditional Chinese medicinal materials are steamed with vinegar, such hazardous substances attached to the medicinal materials as germs, pathogenic microorganisms and ova can be killed, drug properties are moderate, the excretory function of the human body can be strengthened by addition of fresh ginger, black tea and honey, and fat can be effectively decomposed due to adoption of lotus leaf; therefore, the ginger tea slimming tablet has the slimming effect.