The invention belongs to the field of chemical engineering paint and particularly relates to graphene formaldehyde-resisting paint and a preparing method thereof. The graphene formaldehyde-resisting paint is prepared from water, cellulose, a wetting agent, an anti-freezing agent, a thickening agent, a defoaming agent, titanium dioxide pulp, padding pulp, a multifunctional amine assistant, emulsion, a coalescing agent, a sterilizing agent, a flatting agent and a formaldehyde resisting agent, wherein the formaldehyde resisting agent is a mixture of graphene and nanometer titania. According to the graphene formaldehyde-resisting paint and the preparing method thereof, a traditional formulation is improved, graphene serves as a photocatalytic carrier by means of the light transmittance of graphene, and thus the efficiency of a photocatalytic reaction is greatly improved. Meanwhile, graphene is added to nanoscale titania, the absorption rate of visible light is increased, and the electron conduction efficiency is improved. In addition, due to the addition of graphene, the wear-resisting property of the water-based emulsion paint is improved.