NOVELTY - A silver powder which contains polymer microspheres and nano-sliver coatings on surfaces of polymer microspheres which comprises methacrylic resin, photoinitiator 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and polyvinyl alcohol by ultraviolet irradiation is prepared by stirring monomer mixture of acrylic resin in toluene and methyl ethyl ketone solvent, adding and stirring 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, adding and stirring solution of polyvinyl alcohol dispersant with mass fraction of 0.6% to obtain stable suspension, and photopolymerization.    USE - Preparation of silver powder for silver paste (claimed) used for film batteries.    ADVANTAGE - Silver powder has controllable morphology and reasonable size distribution, decreases noble metal consumption, lowers cost, increases dispersibility and stability, and enhances conductivity of silver paste.    DETAILED DESCRIPTION - A silver powder which contains polymer microspheres and nano-sliver coatings on surfaces of polymer microspheres which comprises methacrylic resin, photoinitiator 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, and polyvinyl alcohol by ultraviolet irradiation is prepared by stirring monomer mixture of acrylic resin in toluene and methyl ethyl ketone solvent, adding and stirring 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, adding and stirring solution of polyvinyl alcohol dispersant with mass fraction of 0.6% to obtain stable suspension, photopolymerization by subjecting to UV light irradiation to obtain polymer microspheres dispersion, and filtrating in which mass ratio monomer:solvent is 1:3-6, mass ratio toluene:methyl ethyl ketone is 2:1, mass ratio 2,4,6-trimethylbenzoyl-diphenylphosphine oxide:monomer is 0.005-0.05:1, mass ratio polyvinyl alcohol:monomer is 0.05-0.1:1, UV time is 3-5 minutes, UV intensity is 120 W/cm2, nano-silver layer coated on surface of polymer microspheres is made of silver nitrate solution, polyvinylpyrrolidone dispersants is obtained by reducing hydrazine hydrate solution prepared in situ synthesis, and preparation of polymer microspheres involves dispersing upto 40-60%, adding 2 mol/L silver nitrate solution and dispersing agent polyvinylpyrrolidone, stirring, heating to 40-60 degrees C, adding 0.5 mol/L hydrazine hydrate reducing agent, stirring, reacting for 30-50 minutes, adjusting pH with aqueous ammonia with mass fraction of 2-5%, centrifuging, rinsing with water, rinsing with ethanol and ion 3-5 times, and drying in which mass ratio silver nitrate solution:microsphere dispersion is 1-3:1, mass ratio mass ratio polyvinylpyrrilidone:microsphere dispersion is 0.05-02:1, and mass ratio hydrazine hydrate solution:silver nitrate solution is 0.1-0.5:1. An INDEPENDENT CLAIM is included for preparation of silver paste from silver powder which involves evenly mixing silver powder and glass adhesive in organic solvent with mass ratio silver powder:glass adhesive of 5-8:1, and mass ratio organic solvent:glass adhesive of 0.5-0.8:1.