The invention relates to an intelligent controlled-release corrosion inhibitor. The solvent of the corrosion inhibitor comprises deionized water, wherein the solute comprises the following componentsof, in parts by concentration, 5-15 mg/ml of graphene oxide, 0-5 mg/ml of benzimidazole and 0-5 mg/ml of cerium nitrate; and a preparation method of the intelligent controlled-release corrosion inhibitor comprises the steps of preparing an aqueous solution of the graphene oxide, adding the cerium nitrate to obtain a suspension, adding the benzimidazole and stirring, and washing to obtain the the intelligent controlled-release corrosion inhibitor. Compared with the prior art, the intelligent controlled-release corrosion inhibitor has the advantages that the corrosion inhibitor can be released at a certain pH value, and the effectiveness and the durability are high.