Abstract: A heating assembly, comprising a base plate, the base plate being provided with a plurality of ceramic heating sheets, the ceramic heating sheets being spaced apart side by side and being connected in parallel, and a heat conduction structure being provided over the ceramic heating sheets. An electrothermal furnace having the heating assembly is also provided.

Abstract: An ultra-thin heating device includes an upper heating pad, a lower heating pad, at least one electric heating piece and a power supply. The electric heating piece is installed at a preset position between the upper heating pad and the lower heating pad. The electrothermal sheet is electrically connected with the power supply. The upper heating pad and the lower heating pad are made of soft material. When a food needs to be heated, the food is placed on the preset position of the upper heating pad corresponding to the at least one electrothermal sheet, and the power supply provides electric power to the at least one electrothermal sheet to heat the food. Because the upper heating pad and the lower heating pad are made of soft material, when not in use, the ultra-thin heating device can be folded or rolled up for storage.