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This invention discloses a water-based treatment agent for improving the zirconization properties of high-strength pickled steel, which contains the following active ingredients: a nitrate ion compound, wherein the molar concentration of nitrate ions is 0.02-0.6 mol / L; a metal ion compound, wherein the metal ion is at least one of Fe ions, K ions, Na ions, Cu ions, and Zn ions, and the molar concentration of the metal ion is 0.004-0.03 mol / L; an organic acid, wherein the molar concentration is 0.01-0.5 mol / L; and a surfactant, wherein the molar concentration is 0.002-0.03 mol / L.