The invention discloses an LED (light emitting diode) illuminating lamp. The LED illuminating lamp comprises a lamp cover, LED mounting plugs, connection tubes and a thermal energy converter. The interior of the lamp cover is hollow, the top of the lamp cover is provided with a round hole, the connection tubes penetrate through the round hole, the tail ends of the connection tubes penetrating into the lamp cover are provided with the LED mounting plugs, energy-saving bulbs are connected onto the LED mounting plugs, the thermal energy converter is arranged on the inner wall of the lamp cover and fixed onto the inner wall of the lamp cover through a connector. The LED illuminating lamp has the advantages that a function of thermal absorption can be realized, and thermal energy generated by the bulbs can be completely converted into useful energy by the internal thermal energy converter, so that thermal energy is effectively used to avoid waste of resources while recycling of seemingly waste energy is realized, and the LED illuminating lamp is innovative and progressive in terms of energy recycling; further, light attenuation of the LED lamp is lowered, and service life of the LED lamp is prolonged.