NOVELTY - A gel electrolyte preparation method involves uniformly stirring and mixing gas phase silicon dioxide, sulfuric acid, pure phosphoric acid, anhydrous sodium sulfate, stannous sulfate, lithium iodide and carbonate, isopropanol, acrylamide, fluorine-based silicon-free defoamer, anti-aging agent and deionized water to obtain solution (I). A conductive polyaniline is added to deionized water and silicon dioxide under stirring. Isopropyl alcohol and acrylamide are added and stirred to obtain solution (II). The solutions (I and II) are mixed. The defoamer and anti-aging agent are added and stirred.    USE - Method for preparing a gel electrolyte that is utilized for a lead-acid battery.    ADVANTAGE - The method enables reducing the internal resistance of the battery, increasing the capacity of the battery, and prolonging the service life of the battery.    DETAILED DESCRIPTION - A gel electrolyte preparation method involves uniformly stirring and mixing gas phase silicon dioxide (10-60 parts), sulfuric acid (0.5-2 parts), 50-60% pure phosphoric acid (40-60 parts), anhydrous sodium sulfate (5-10 parts), stannous sulfate (0.2-1 parts), lithium iodide (0.1-0.5 parts), lithium carbonate (0.2-0.5 parts), isopropanol (0.5-1 parts), acrylamide (0.1-0.3 parts), fluorine-based silicon-free defoamer (0.1-0.2 parts), anti-aging agent (0.005-0.01 parts) and deionized water (0.01-0.2 parts) to obtain the solution (I). A conductive polyaniline is added to the de-ionized water and gas-phase silicon dioxide under lower stirring at a rotating speed of 2000-3000 rounds/minute. Isopropyl alcohol and acrylamide are added to the stirred solution and continuously stirred to obtain the solution (II). The solution (I) and the solution (II) are mixed at a stirring speed of 3500-4000 rounds/minute. The fluorine-based silicon-free defoamer and anti-aging agent are added to the resulting mixture and continuously stirred at a speed of at 3500-4000 rounds/minute to obtain the gel electrolyte.