Double separation layer type electric heating tube

The utility model provides a double-interlayer electric heating pipe. The electric heating pipe is characterized in that the exterior of the existing electric heating pipe is also sheathed and connected with a U-shaped electric heating pipe composed of an electric heating wire, magnesium powder and a stainless steel outer sleeve pipe; the U-shaped electric heating pipe is characterized in that the exterior of the electric heating pipe is also sheathed and connected with a closed type outer metal sleeve pipe which is connected with a bottom seat of the electric heating pipe and is water corrosion resistant; a powdery insulating layer is filled between the outer metal sleeve pipe and the electric heating pipe. The utility model has the advantages that the electric heating pipe is not easy to be cracked, the use is safe, the service life of the electric heating pipe can be extended, etc.; the utility model is suitable for various water storage closed type electric water heater.