Flexible electrothermal film and preparation method thereof

The invention provides a flexible electrothermal film and a preparation method thereof, and relates to the field of electrothermal films, and the preparation method comprises the following steps: printing a conductive slurry on the surface of a base film, placing the base film in an electric field with the electric field direction being the same as the current direction between electrodes on the base film, drying, and packaging to obtain the flexible electrothermal film. The conductive slurry comprises the following components in parts by weight: 50-80 parts of resin, 15-55 parts of conductive filler, 5-10 parts of a curing agent, 1-30 parts of an auxiliary agent and 15-45 parts of a solvent. The composite conductive filler formed by at least one of the modified carbon black, the modified graphene, the carbon nanotubes and the graphite is matched with the electric field treatment, and the composite conductive filler and the electric field treatment have a synergistic effect, so that the prepared electrotherma