The invention discloses a chitosan-added bactericidal peelable polymer antirust film, which is prepared from the following raw materials: aluminum isopropoxide, silane coupling agent KH560, tetraethyl orthosilicate, isostearic acid Monoglyceride, polyethylene glycol, methacryloxypropyltrimethoxysilane, polyvinyl alcohol, borax, chitosan, silver-loaded zirconium phosphate, silane coupling agent A151, glutaraldehyde, naphthenic acid Zinc, triethanolamine, benzotriazole, sodium lauryl sulfate, appropriate amount of lauryl dimethyl amine oxide, appropriate amount of nitric acid, appropriate amount of hydrochloric acid, appropriate amount of absolute ethanol, appropriate amount of acetic acid, appropriate amount of deionized water; the present invention The prepared antirust agent can form a thin film on the surface of the workpiece, which is antibacterial, hydrophobic, oleophobic, not easy to break, has good heat resistance and weather resistance, plays a good antirust and anticorrosion effect, and is easy to peel off later, which is worth promoting.