A delayed cross-linking agent, that is, the organic zirconium cross-linking agent ECA-1, is developed by using zirconium oxychloride, citric acid, lactic acid and so on as raw materials and a high temperature delayed cross-linked acid is generated from adding the cross-linking agent ECA-1 to thickening acid EVA-180. Analyzed are the reaction conditions of the cross-linking agent and effect of concentrations of the cross-linker and thickening agent on cross-linked acid performance and evaluated is the high temperature rheological property. The results show that the obtained cross-linked acid has good temperature-tolerate and shear-tolerate properties when the ratio of such raw materials as zirconium oxychloride, lactic acid and xylitol is 1: 1.25:0.0208 (mass ratio), reaction temperature is 50-55 ℃ and reaction time is 4 hours, and the delayed crosslinking time of acid system can be adjusted by changing dosage of the cross-linker and thickening agent.