▎ 摘　　要

NOVELTY - Preparing graphene ink comprises mixing the graphene oxide, palladium salt, first solvent and acid to obtain first mixing system, dispersing the gas phase silicon dioxide in the first mixing system to obtain second mixing system, performing vacuum drying treatment to the second mixing system, loading the palladium salt particles formed by the palladium salt and acid reaction on the graphene oxide, coating the graphene oxide loaded with palladium salt particles with gas phase silicon dioxide particles to obtain palladium catalyst-graphene oxide-gas phase silicon dioxide composite particles, and palladium catalyst-graphene oxide-gas phase silicon dioxide composite particles and resin, second solvent, conductive carbon black, dispersing agent, flatting agent and antifoaming agent to obtain the graphene ink. USE - The graphene ink is useful in electronic circuit. ADVANTAGE - The method only needs three steps of surface cleaning, screen printing and copper sinking, greatly shortens process steps of chemical copper deposition, and greatly reduces use of chemical reagents in the copper deposition process. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) graphene ink; and (2) manufacturing printed circuit board, comprising providing the graphene ink, printing the graphene ink on the substrate of the circuit board to form circuit pattern, and forming copper layer on the surface of the circuit pattern.