Thin polarizing film and preparation method and application thereof

The invention relates to the technical field of polarizing films, and discloses a thin polarizing film and a preparation method and application thereof, and the specific preparation steps are as follows: 1) preparation of a linear polarizer: coating a substrate film with a polarizing chemical substance, applying tension, heating and curing to form a film, then immersing in a dichroic pigment, and drying to form the linear polarizing film; and 2) preparing a liquid crystal compensation film, coating a liquid crystal chemical substance on the substrate film, and heating and curing to form the film. And (3) laminating, namely cutting the liquid crystal compensation film according to a required angle, compounding the linear polaroid with one side of the liquid crystal compensation film through glue, and compounding a pressure-sensitive adhesive and a release film on the other side of the liquid crystal compensation film. According to the invention, the total thickness is less than 60m, and the flexible OLED displ