▎ 摘　　要

NOVELTY - A graphene-platinum nanoparticle-polypyrrole composite material preparing method involves adding 0.01-0.1 mol hydrochloric acid and chloroplatinic acid in 50 ml water solution to obtain a solution material. The solution material is dispersed with graphene to obtain solution M. The solution N is prepared by adding pyrrole and hydrochloric acid in 50 ml aqueous solution. The solution N is added slowly in solution M and stirred with a magnetic force stirrer, followed by reaction the solution for 2 hours after stirring, filtering, washing and drying to obtain the finished product. USE - Method for preparing graphene-platinum nanoparticle-polypyrrole composite material for preparing photosynthetic biologic fuel cell (claimed). ADVANTAGE - The method enables preparing composite material with good electrode conductive properties and biocompatibility, and increased output power, in simple and cost effective manner.