The invention belongs to the technical field of preparation of a multifunctional polymer material, and specifically relates to a preparation method of a low-air-resistance antistatic antirust film. Anantirust outer film is made from ethyl cellulose; a sodium phytate solution is made into an antirust agent, which is treated to obtain an antirust inner film; and the outer film and inner film undergo hot pressing to obtain an antirust film. The antirust agent is a metal polydentate chelating agent. When phytic acid is complexed to metal, a layer of a compact single-molecule protection film is formed at the surface. Since a single molecule electron hole conductive layer is formed at the surface of treated metal, the conductive layer makes a passivated metal film layer conductive to lead the current out, and an antistatic effect is achieved. An alloy surface treated by benzotriazole and contained in the antirust outer film can isolate the metal surface from a corrosion inhibition medium, so that the film is excellent in corrosion inhibition effect, and is maintained with low air resistance, and outer air is prevented from permeating into the film and corroding the protected metal. Thefilm is of great significance.