In the process of interoperable traffic IC card, the diversity of the resonant frequency of IC card of the different city using caused incompatibility and credit card blind with IC card and terminal in interoperable work. Combines with the principle of resonance frequency of IC card and a lot of experimental data, analysis the test error of IC card resonance frequency, summed up a test scheme under a crossregional mode for resonant frequency of interoperable traffic IC card by the method of statistical analysis. The experimental data show that this method could better converge the value range of resonant frequency on the condition of does not affect the user experience of IC card.