Heating film and preparation method and application thereof

The invention relates to a heating film as well as a preparation method and application thereof. The preparation method comprises the following steps: arranging a carbonaceous layer on one side surface of a release film; arranging the first insulating layer on the surface of one side of the carbonaceous layer by adopting a roller; the release film on the carbonaceous layer is removed, and a metal electrode layer is arranged in an electrode connection area of the carbonaceous layer; and arranging the second insulating layer on the other surface of the carbonaceous layer by using a roller film to obtain the heating film. According to the invention, the carbon layer is packaged between the insulating layers by using the release film in a roller laminating manner, so that the carbon layer is ensured not to deform and has no bubbles in the packaging process, and the heating structure has the characteristic of stable heating. 本申请涉及一种发热膜、其制备方法和应用，制备方法包括：将碳质层设置在离型膜的一侧表面上；采用滚轮将第一绝缘层设置于碳质层的一侧表面；将所述碳质层上的离型膜去除，并在所述碳质层的电极