NOVELTY - An aluminum slurry composition contains (wt.%) spherical aluminum powder (50-85), lead-free glass adhesive (2-15), organic carriers (10-35) and metal or non-metal powder additives (0.5-6). The active aluminum in the metal aluminum powder is greater than or equal to 99.8 wt.%. The mean grain size of the aluminum powder is 2-8 mu m, while the specific surface area is 0.6-1.5 m2/g, the apparent density is 0.6-0.8 g/cm3 and the compaction density is 1.0-1.8 g/cm3. The organic carriers may be formed from (wt.%) organic resin (2-20), additives (2-12) and solvent (8-30).    USE - Aluminum slurry composition for crystalline silicon solar cell.    ADVANTAGE - The composition can increase photoelectric conversion of the solar cell.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of aluminum slurry composition, comprising:    (A) dissolving the raw materials forming the organic carriers by heating in water bath at 75-96 degrees C to obtain clear, transparent and uniform organic carrier solution, and then cooling the solution;    (B) putting the raw materials forming the lead-free glass adhesive into a quartz crucible after uniformly mixing, and then putting the whole crucible into a melting furnace for heating at 1200-1300 degrees C; at this temperature, preserving heat for 1-3 hours for melting the raw materials; after crushing the melted material into 2-3 mm, putting it into a polyurethane ball milling jar and then performing ball billing on it by a ball mill at 400 revolutions per minute for 8-24 hours according to a weight ratio of agate balls to glass material and deionized water being 1.5:1:1; and then obtaining glass powder with a grain size less than 8 mu m after dehydration, drying and screening; and    (C) uniformly mixing the spherical aluminum powder with the organic carrier solution, the glass powder and the metal or non-metal powder additive, and then grinding the mixture until the granularity of the mixture is 8-15 mu m and the viscosity is 20-90 Pa-seconds, thus obtaining the product aluminum slurry.