The present invention discloses a sandwich cake processing method comprising the following steps: blending materials: the raw materials of the sandwich cake includes wrapping materials and stuffing materials, the wrapping materials consist of eggs, granulated sugar, sugar syrup, etc., and the stuffing materials is composed of vegetable oil, granulated sugar, water, whole milk powder, edible corn flour, etc.; whipping the wrapping materials: the eggs, granulated sugar, trehalose, sugar syrup, etc., are successively mixed and stirred in order; forming and steaming: the cake raw materials with an intermediate layer being the stuffing materials and an upper and a lower layer being the wrapping materials are put into a mold to be formed, and steamed at a temperature of 100-105 DEG C; and finally the cake materials are cooled, sterilized and packaged to obtain the finished products. The sandwich cake is unique in formulation, is scientific and closely examined in material use, is simple and practical in production method, and is high in nutrition ingredients, is soft, glutinous, fragrant and smooth, is excellent in mouthfeel, is mature in production equipment, and can realize large-scale production.