The present invention belongs to the technical field of applications of iron-supplementing-type food functional enhancers and particularly relates to a heme-supplementing new formulation and a preparation method thereof. The heme-supplementing new formulation comprises the following raw materials in weight percentages: 20%-23% of butter, 6%-10% of eggs or egg powder, 6%-10% of sugar-free pure cocoa powder, 20% of powdered sugar (or white granulated sugar), 40% of starch, 0.03% of heme and the balance other food additives added in accordance with biscuit food standards. The present invention also discloses the preparation method of the heme-supplementing new formulation. Chocolate biscuits are used as iron-supplementing-type functional food, good in smell adaptability and relatively high inacceptability. The heme raw materials at a content of 15-50% can be used to get rid of restrictions on purity, weight and volume of the raw materials by formulation quantifying, and the new formulation is high in use freedom degrees. A color of the chocolate biscuits is close to a color of the heme, the chocolate biscuits are relatively high in senses, and a burnt aroma of the chocolates can wellmask smell of the heme.