The utility model provides a kind of furnace body
auxiliary heating device and reaction furnace, wherein furnace body
auxiliary heating device includes heat conduction sleeve, is installed on furnace body and extends into furnace body inside;Heating
pipe, along the axial direction of heat conduction sleeve is set in heat conduction sleeve;Several
heating furnace filaments, are around set in heating
pipe outside;Lead-out wire, is connected to
heating furnace filament, and along the axial direction of heat conduction sleeve leads out heat conduction sleeve;Furnace body
auxiliary heating device controls
heating furnace filament heating furnace body inside by lead-out wire.The utility model provides the heat conduction sleeve and heating
pipe of furnace body auxiliary heating device are installed on furnace body and extend into furnace body, and the furnace body center area of reaction furnace can be assisted heating by furnace body auxiliary heating device, under the premise of guaranteeing that furnace body radial dimension increases to promote capacity, the temperature of furnace body center area is guaranteed simultaneously, promote the uniformity of temperature in reaction cavity, avoid that
silicon wafer film-forming uniformity and battery piece quality decline.