The invention discloses graphene cluster based carbon system electric heating slurry as well as a preparation method and application thereof. The slurry comprises the following components in parts by weight: 10-70 parts of a conductive heat-conduction agent, 10-70 parts of a far-infrared reinforcing agent, 10-60 parts of a solvent, 0.1-10 parts of an additive and 5-60 parts of a resin connecting agent, wherein the conductive heat-conduction agent comprises graphene clusters. By adoption of the mode that the graphene clusters are separately combined with other carbon materials so as to be used as the conductive heat-conduction agent and the far-infrared reinforcing agent of the electric heating slurry, the electrical resistivity of the slurry after being printed into films is greatly reduced, the heat conduction property, the electric heating conversion efficiency and the far-infrared radiation intensity are improved, the manufacturing cost is lowered, the velocity of the slurry is also reduced, the flowability and the transferring printing adaptability of the slurry are improved, and the electric heating slurry has great significance for energy conservation, consumption reduction, health physiotherapy and the like.