Preparation method of conductive ink

The invention relates to the technical field of ink preparation, in particular to a preparation method of conductive ink. The preparation method comprises the following steps: carrying out amino-alkene addition reaction on methyl allyl tri-n-butyltin and an amino di (methylene phosphate)/Ag complex to form a corresponding addition product, carrying out sulfydryl-alkene addition reaction on the addition product and sulfydryl graphene, and finally, carrying out amino-sulfydryl addition reaction to obtain the silver/tin composite hybrid graphene material. Through the reactions, the silver particles can grow among the graphene sheet layers, so that the conductivity of the ink is enhanced, and the stacking of the graphene sheet layers is also prevented; the prepared silver/tin composite hybrid graphene material is more suitable for preparation of conductive ink than pure graphene; the production cost of the conductive ink can be reduced, and the weight of the conductive ink can be greatly reduced. 本发明涉及油墨制备技术领域，具体