The invention relates to a biscuit with fat-reducing efficacy. The formula of the biscuit comprises wheat flour, edible vegetable oil, fresh eggs, oat protein, drinking water, milk powder, green coffee bean extract, edible processing yeast, edible salt, soya lecithin, xylitol, polydextrose, vitamin C, ammonium bicarbonate, calcium dihydrogen phosphate, sodium carbonate, citric acid and tea polyphenol. The biscuit with the fat-reducing efficacy is rich in high-quality protein needed by a human body, carbohydrate with a low glycemic index and water-soluble dietary fibers, has comprehensive and balanced nutrients such as multiple plant active substances facilitating metabolism of superfluous energy inside the body, vitamins, mineral matters and the like, has a low heat content, is rich in Prebiotics optimizing intestinal flora, is free from cane sugar, does not contain trans fatty acids, artificial colors and forbidden medicaments, guarantees that no toxic and side effects exist while reducing heat intake and internal fat accumulation, and enables a user to keep fit while the user enjoys delicious food.