▎ 摘　　要

NOVELTY - Preparing graphene conductive ink comprises mixing carbon black and graphite and grinding to obtain the composite conductive filler; quantity respectively taking 10-14 ml, 28-32 ml, 28-32 ml and 49-53 ml of ethanol, ethylene glycol, glycerine and de-ionized water mixing and stirring to obtain mixed solvent; the composite conductive filler 580-620 mg and sodium carboxymethyl cellulose into mixing solvent to do ultrasonic treatment, and then centrifugally separating, the obtained supernatant is graphene conductive ink; graphene composite conductive filler occupying mass ratio is 1-30%. USE - The method is useful for preparing graphene conductive ink (claimed). ADVANTAGE - The method is economical. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for inkjet printing flexible paper-based conductive lines comprising placing graphene conductive ink into the inkjet printer, performing ink-jet printing on a paper-based printing material to obtain flexible paper-based conductive lines.