A light emitting diode (LED) street lamp includes an LED chip, a ceramic substrate, a lamp shade, a nano-enamel layer and a thermally radiative heat dissipation film. The nano-enamel layer is disposed on the ceramic substrate to provide electrical insulation and isolation for protection, is made from nano-particles to have a surface with the function of self-cleaning due to lotus effect. The thermally radiative heat dissipation film is disposed on the inner surface of the lamp shade and the surface of the ceramic substrate, and has a surface microscopic crystalline structure. The thermally radiative heat dissipation film fastly propagates the heat generated by the LED chip by thermal radiation in some specific direction so as to improve the efficiency of heat dissipation, reduce the total thickness, enhance the efficiency of light emitting and effectively prolong the lifetime of the LED street lamp.