NOVELTY - A conductive polymer coated sulfur-modified nickel-aluminum lithium composite preparing method involves preparing lithium-nickel-aluminum-oxide material by mixing nickel chloride, lithium chloride, aluminum sulfate and water, stirring, dissolving diammonium hydrogen carbonate in water. Sulfur-modified conductive polymer is prepared by mixing sulfur-modified sulfur powder and polybutene nitrile powder, sintered, followed by taking lithium-nickel-aluminum-oxide material and sulfur-modified conductive polymer, milling, mixing, sintering and cooling to obtain the finished product.    USE - Method for preparing conductive polymer coated sulfur-modified nickel-aluminum lithium composite.    ADVANTAGE - The method enables preparing conductive polymer coated sulfur-modified nickel-aluminum lithium composite with increased capacity, improved conductivity and good cycle stability.    DETAILED DESCRIPTION - A conductive polymer coated sulfur-modified nickel-aluminum lithium composite preparing method involves preparing lithium-nickel-aluminum-oxide (LiNi0.7Al1.3O4) material by mixing nickel chloride, lithium chloride, aluminum sulfate and water, stirring, dissolving uniformly to obtain mixed solution having total metal ion concentration of 2-2.5 mol/l, stirring at 40-50 degrees C for 2-4 hours, dissolving diammonium hydrogen carbonate in water to give precipitant solution having concentration of 2-3 mol/l. The mixed is mixed with precipitant solution by dropping slowly at a speed of 5-10 ml/minute to obtain reaction solution. The pH of the reaction solution is adjusted to 8-10, stirred, subjected for aging and filtered to obtain a precipitate. The precipitate is washed with detergent, cooled at -15 degrees C to -20 degrees C for 3-6 hours and vacuum dried to obtain a precursor. The precursor is sintered at 750-850 degrees C for 5-7 hours under air atmosphere to obtain the lithium-nickel-aluminum-oxide (LiNi0.7Al1.3O4) material. Sulfur-modified conductive polymer is prepared by mixing sulfur-modified sulfur powder having particle size of 20-50 mu m and polybutene nitrile powder having particle size of 10-20 mu m at a mass ratio of 10:5-20, sintered at a power of 350-400 V for 3-5 hours under argon atmosphere, subjected for heat treatment at 150-250 degrees C for 1-3 hours, remove sulfur, subjected for aging and cooled to obtain sulfur-modified conductive polymer, followed by taking the lithium-nickel-aluminum-oxide material and the sulfur-modified conductive polymer at a mass ratio of 100:10-15, milling in ball mill at a speed of 300-400 rpm for 3-5 hours, mixing, sintering under air atmosphere, raising temperature to 200-300 degrees C for 1-2 hours with a heating rate of 5-10 degrees C/minute and cooling at a rate of 15-20 degrees C/minutes to obtain the finished product.