The invention relates to a far infrared electric heater with a radiator. The far infrared electric heater is composed of a shell, a far infrared heater, the radiator, a power line box, a power switch, a temperature controller, a foldable clothes hanger and trundles. The far infrared electric heater with the radiator is characterized in that the far infrared heater is installed at the bottom of the inside of the shell, and the radiator is installed above the far infrared heater; the foldable clothes hanger is installed above the outside of the shell; the power switch, the temperature controller and the power line box are installed on the front face of the shell; radiating holes are formed in the two sides and the upper portion of the shell; the trundles are installed at the bottom of the shell; the far infrared heater is composed of a metal shell, a thermal insulation layer, a far infrared radiation material layer and tooth-shaped alloy electric heating tapes which are inserted into the far infrared radiation material layer and the thermal insulation layer. The radiator is formed in the way that a plurality of radiating fins are symmetrically connected in series to be installed together in a back-to-back mode. The far infrared electric heater with the radiator has the beneficial effects that far infrared rays which are beneficial to human bodies can be realized, the cooling effect is good, the failure rate is low, the service life is long, and practicability is high.