NOVELTY - Gelatin is added to isopropanol solution, stirred uniformly, pH of the reaction system is adjusted to 2-5 using nitric acid solution, and stirred. Silver powder and aluminum powder are added to the obtained solution, stirred, methylvinylcyclosiloxane monomer and chloroprene monomer are added, stirred, then emulsifying agent is added, temperature is increased to 70-85 degrees C, then organic acid catalyst and ammonium persulfate initiator are added, reacted, filtered, dehydrated, glass binder and organic solvents are added and stirred uniformly, to obtain conductive silver-aluminum slurry.    USE - Preparation of conductive silver-aluminum slurry for silicon-based thin film solar cell.    ADVANTAGE - The silver-aluminum slurry having excellent disperse performance and conductivity, is prepared.    DETAILED DESCRIPTION - Gelatin (0.05-2 %mass) is added to isopropanol solution (0.2 mol/liter) in mass ratio of 0.05-2:1, stirred uniformly, pH of the reaction system is adjusted to 2-5 using nitric acid solution (0.0001 mol/liter) under ultrasonic dispersing condition, stirred. Silver powder in mass ratio of 0.3-0.5:1 with respect to gelatin solution, and aluminum powder in mass ratio of 0.1-0.3:1 with respect to gelatin solution, are added to the obtained solution, stirred for 30-60 minutes, to obtain silver-aluminum powder dispersion liquid. Methylvinylcyclosiloxane monomer in mass ratio of 0.5-0.8:1 with respect to silver-aluminum powder dispersion liquid, and chloroprene monomer in mass ratio of 0.2-0.5:1 with respect to silver-aluminum powder dispersion liquid, are added, stirred, then emulsifying agent is added in mass ratio of 0.1-0.2:1 with respect to methylvinylcyclosiloxane monomer, stirred for 1 hour, temperature is increased to 70-85 degrees C for 30-60 minutes, then organic acid catalyst in mass ratio of 0.04-0.1:1 with respect to methylvinylcyclosiloxane monomer, and ammonium persulfate initiator in mass ratio 0.5-1.5:1 with respect to methylvinylcyclosiloxane monomer are added, and reacted for 2-4 hours. The obtained solution is filtered, dehydrated by vacuum to obtain surface-modified silver powder colloid. The surface-modified silver powder colloid, glass binder and organic solvents are mixed and stirred uniformly, to obtain conductive silver-aluminum slurry. The mass ratio of the surface-modified silver powder colloid and glass binder is 5-8:1. The mass ratio of organic solvent and glass binder is 0.5-0.8:1.