In this paperthe repetition rate selection of high-repetition-rate laser decoy is studied.Based on the jamming principle of high-repetition-rate laser decoythrough the theoretical analysis and numerical calculation of its jamming pulse energy and repetition ratethe repetition rate application scheme of high-repetition-rate decoy is obtained.The scheme is verified by jamming effect experiment.The research results show that:1) When the high-repetition-rate laser decoy implements decoy jammingthe repetition rate of the high-repetition-rate jamming pulse must be an integral multiple of that of the indicating laser pulse; and 2) At the stage of laser seeker trackingthe high-repetition-rate jamming pulse needs to have higher repetition rate to ensure that there are at least 3~4 jamming pulses entering the time gate; while at the stage of laser seeker searchingthe high-repetition-rate jamming pulse only needs a lower repetition rate to achieve the ideal decoy jamming effect.