The invention belongs to the technical field of food processing, and particularly relates to a milk-flavor cake and a preparation method thereof. The cake consists of the following raw materials: low-gluten flour, erythritol, egg white, egg yolk, butter, cream, honey, almond powder, milk powder, water, corn starch, baking powder, peppermint extractive, salt, volatile Chinese prickly ash oil and volatile Chinese mosla herb oil. According to the invention, the peppermint extractive, the volatile Chinese prickly ash oil and the volatile Chinese mosla herb oil are added as efficacy components, sothat the prepared cake obtained by the invention has the functions of resisting inflammation, resisting bacteria, alleviating pain and resisting oxidation. Second, the present invention replaces traditional white sugar with combination of the erythritol and the honey to make a cake, so that the prepared cake can not only protect gums, but also cause no more organism sugar burden. The cake preparedby the method has natural and safe components, no toxic or side effect, can be consumed as a leisure health-care food for a long time, can ameliorate the toothache symptoms of patients and realize anti-inflammation and analgesic effects, and has broad market prospects.