The present invention discloses a paint removing agent, which comprises, by weight, 1-5 parts of dichlorine, 2-6 parts of formic acid, 1-5 parts of carbon tetrachloride, 1-6 parts of ethyl acetate, 5-25 parts of methyl cellulose, 5-11 parts of benzyl alcohol, 3-7 parts of tartaric acid, 3-10 parts of alkylphenol polyoxyethylene ether, 5-11 parts of ethylene glycol anisole, 8-15 parts of methyltriazole, 8-15 parts of mineral oil, 6-12 parts of trichloroacetic acid, 9-18 parts of benzoic acid, 1-8 parts of trichlorotrifluoroethane, 1-7 parts of methyl benzotriazole, 1-5 parts of potassium permanganate, and 1-7 parts of triacetate fiber. According to the present invention, the paint removing agent uses potassium permanganate, such that a certain oxidation effect is provided, and the paint removing efficiency can be improved; carbon tetrachloride, dichloromethane and ethyl acetate are used as the mixed solvent, such that the paint cured on the surface of the substrate can be well dissolved and stripped; and by adding mineral oil, the performance of the paint removing agent can be further improved, the volatility can be reduced, and the paint film on the surface can be well dissolved.