Abstract: An electrothermal drying device has a hollow main body, a plurality of reflection hoods covering infrared electrothermal tubes, a plurality of air-inhaling blowers connected to the hollow main body, a plurality of waste vapor-exhaling blowers, a plurality of air separation devices, two air inlet stranglers, two pairs of high pressure gas valves connected to two high pressure gas tanks, a plurality of electric heaters disposed in the hollow main body, two emergency air-exhaling stranglers connected to the hollow main body, a plurality of heat-resistant glass panes located in the hollow main body and abutting the reflection hoods, two water atomizing devices located in the hollow main body and connected to two water tanks, and reflection hoods each having an is automatic rotating device.