Sandwich dryer

The utility model relates to a sandwich drying device, which comprises a machine frame, a drying chamber arranged on the machine frame, and a vibration device, wherein, at least one drying layer is arranged in the drying chamber. The utility model is characterized in that the bottom surfaces of material supporting plates of drying layers are provided with heating medium passages which are converged together at one side of the drying chamber and communicated with a heating medium inlet, and the passages are converged together at the other side of the drying chamber and communicated with a heating medium outlet. The utility model is especially suitable for drying powdery materials and materials with lighter specific weight. The utility model has the advantages of simple structure and easy manufacturing; because the material supporting plates are connected by screws, the working surface can be ensured to be smooth.