The invention discloses a scale and corrosion inhibitor which comprises trifluoroethyl methacrylate, hexafluorobutyl acrylate, chloropropene, lauryl amine, deionized water, trimethylamine, zinc sulfate and sodium gluconate. The scale and corrosion inhibitor is mainly applicable to the field of industrial circulating cooling water, and has favorable corrosion and scale resistance. The preparation technique is simple and controllable, and is suitable for large-scale industrial production.