The invention discloses a leakage current shielding film, comprising an upper layer, a middle layer and a lower layer which are laminated together, wherein the upper layer and the lower layer are insulated layers, the middle layer is a metal mesh or a metal thin film, at least one lateral edge of which is fixed with a metal piece or a metal strip. The leakage current shielding films are coated above and/or below each electrothermal film controlled by each temperature controller, and the middle layer of each shielding film is ensured to be connected with the zero line of the temperature controller. When the leakage current shielding films are coated on the upper/or lower surface of the electrothermal film and the above connection can be ensured, the leakage current can be effectively shielded, and the leakage current shielding film has low cost, high safety and no influence on normal use of the electrothermal film.