The invention discloses an improved heat-radiating structure of a light-emitting diode (LED) illuminating lamp. The structure comprises an illuminating lamp lifting plate, heat-radiating louver grooves, fastening square grooves, a spiral heat radiator, a concave shell sleeve block, a sponge mat block, a Z-shaped clamping plate, a heat radiator chassis, a bulb glass cover and an LED bulb. The spiral heat radiator is inserted into the heat radiator chassis; the axes of the spiral heat radiator and the heat radiator chassis are collinear; a groove ring of the heat radiator chassis is fastened with a frame of the bulb glass cover; and the LED bulb is arranged in the bulb glass cover. According to the improved heat-radiating structure of the LED illuminating lamp provided by the invention, thespiral heat radiator is provided with a gear transmission device, an intermittent conduction mechanism, a rotary plate lifting device, a piston cylinder air blowing device, a sliding block support mechanism, a wheel plate rotating device, a rod piece pivoting mechanism and a double-push rod telescoping mechanism, so that an effect of the heat radiator with the improved heat-radiating structure isenhanced; on the appearance structure, the simple frame cover is used for protecting, so that the shell cover can be disassembled conveniently without influencing the internal heat radiating; and withwind swirling circulating reflux, internal and external air is driven to circulate, and meanwhile, the wind power is continuously improved through spiral heat radiating.