The invention discloses a water-cooled radiating light emitting diode (LED) street lamp, which comprises a lampshade, an LED chip, a radiating pedestal, a stand pipe, radiating water pipes, a submersible pump, a water tank and a radiating shell, wherein the LED chip is tightly attached to the radiating pedestal, the radiating pedestal is hollow, the central open pore of the radiating pedestal is connected with the stand pipe, and four sides of the radiating pedestal are connected with the water tank through the radiating water pipes; the water tank is fixedly connected with the inner wall of the radiating shell; the submersible pump is arranged in the water tank; and the drainage port of the submersible pump is connected with the stand pipe. The LED street lamp has the advantages that: by water-cooled radiating, over-high temperature rise of the LED chip is prevented, the LED chip is difficult to damage due to high temperature, and the service life of the lamp is prolonged; and the lamp is easy to manufacture, install, produce and operate.