The invention relates to a method for processing sandwich cakes, comprising the following steps of adopting fresh egg liquid, wheat powder, white granulated sugar, salad oil, margarine and maltose syrup as raw materials; adopting milk powder, citric acid, cake foaming agent, flavoring essence and food coloring as auxiliary materials; whipping, casting to form, baking, cooling, cutting, drying, sorting and sandwiching to obtain the sandwich cakes. The auxiliary materials comprise the following components by weight in parts: 35-40 parts of the fresh egg liquid, 22-25 parts of the wheat powder, 20-22 parts of the white granulated sugar, 5-7 parts of the salad oil, 2-3 parts of the milk powder, 1.3-1.6 parts of the cake foaming agent, 4.7-5 parts of the margarine, 5-6 parts of the maltose syrup, 0.15-0.2 parts of the citric acid, 0.1-0.15 parts of the flavoring essence and suitable quantity of the food pigment. The invention not only can prepare the sandwich cakes which have low water contents, long storage time, rich nutrition, exquisite tastes and crisp properties, but also have mature production equipment, and can realize the large-scale production.