NOVELTY - A crystalline silicon solar cell positive conductive silver paste comprises 81-90 pts. wt. coated silver powder, 17-20 pts. wt. vinyl chloride-vinyl acetate, 8-10 pts. wt. dimethylformamide, 6-10 pts. wt. butanone, 0.1-0.2 pts. wt. propyl gallate, 0.7-1 pts. wt. oleic acid, 2-3 pts. wt. polyethylene glycol 1000, 2-3 pts. wt. expandable graphite, 2-3 pts. wt. epoxy tetrahydro dioctyl phthalate, 0.1-0.2 pts. wt. silicon carbide, 0.1-0.3 pts. wt. manganese, 10-16 pts. wt. lead-free glass powder, 10-12 pts. wt. cyclohexanone, and 1.3-2 wt.% nano aluminum.    USE - Crystalline silicon solar cell positive conductive silver paste.    ADVANTAGE - The crystalline silicon solar cell positive conductive silver paste can uniformly and densely coated with nano silver powder on the surface of the polymer microspheres, can reduce the amount of precious metals silver and reduce production cost, and can enhance the dispersion and stability of nano silver powder.    DETAILED DESCRIPTION - A crystalline silicon solar cell positive conductive silver paste comprises 81-90 pts. wt. coated silver powder, 17-20 pts. wt. vinyl chloride-vinyl acetate, 8-10 pts. wt. dimethylformamide, 6-10 pts. wt. butanone, 0.1-0.2 pts. wt. propyl gallate, 0.7-1 pts. wt. oleic acid, 2-3 pts. wt. polyethylene glycol 1000, 2-3 pts. wt. expandable graphite, 2-3 pts. wt. epoxy tetrahydro dioctyl phthalate, 0.1-0.2 pts. wt. silicon carbide, 0.1-0.3 pts. wt. manganese, 10-16 pts. wt. lead-free glass powder, 10-12 pts. wt. cyclohexanone, and 1.3-2 wt.% nano aluminum, where the coated silver powder comprises 4-6 pts. wt. nano ferric oxide, 0.1-0.2 pts. wt. lanthanum sulfate, 300-400 pts. wt. deionized water, 10-13 pts. wt. butyl acrylate, 0.9-2 pts. wt. sodium carboxymethyl cellulose, 0.06-0.1 pts. wt. gamma-glycidoxypropyltrimethoxysilane as silane coupling agent KH560, 0.01-0.02 pts. wt. benzoyl peroxide, 45-60 pts. wt. ascorbic acid, 1-2 pts. wt. locust bean gum, 0.1-0.14 pts. wt. sodium tetraborate, and 100-110 pts. wt. silver nitrate, and is prepared by mixing nano ferric oxide with 31-35 wt.% deionized water, adding sodium carboxymethyl cellulose, uniformly stirring at 70-90 degrees C after adding benzoyl peroxide, standing for 6-10 hours, adding lanthanum sulfate, silane couple agent KH560, stirring under magnetic force for 10-15 minutes to obtain a nano emulsion, mixing a locust bean gum and sodium tetraborate, adding 20-30 wt.% deionized water, dropwisely adding aqueous ammonia, regulating pH to 6.8-7, adding ascorbic acid, uniformly stirring, mixing rest of each raw materials, uniformly stirring, adding obtained reducing liquid to oxidation reduction, adding nano emulsion, stirring at 20-25 degrees C for 25-30 minutes and rotating speed of 1200-1500 rpm, sedimenting for 1-2 hours, pouring supernatant, taking the precipitate, washing with 3-5 times of deionized water and alcohol, drying and grinding into coated silver powder. An INDEPENDENT CLAIM is also included for a method for preparing a crystalline silicon solar cell positive conductive silver paste, which involves taking a mixture of dimethylformamide, butanone and cyclohexanone, adding vinyl chloride-vinyl acetate, uniformly stirring, adding epoxy tetrahydro dioctyl phthalate, mixing for 6-10 minutes, stirring at below 70-80 degrees C to obtain organic carrier, mixing propyl gallate, oleic acid and polyethylene glycol 1000, uniformly stirring to obtain dispersing agent, mixing manganese, expandable graphite, lead-free glass powder and silicon carbide for 10-20 minutes, stirring at below 50-60 degrees C to obtain inorganic adhesive auxiliary agent, adding silver coated powder to organic carrier, uniformly mixing, adding dispersing agent, inorganic adhesive auxiliary agent and rest each raw material, dispersing at high speed, sending into a three roller machine for mixing and grinding slurry granularity to 8-15 mu m to obtain the crystalline silicon solar cell positive conductive silver paste.