In the field of electronic countermeasures,Digital Radio Frequency Memory (DRFM) can quickly store and reproduce radio frequency signals,and effectively interfere with advanced radar systems.In order to improve the survivability of radar,an anti-DRFM spoofing signal is designed.Firstly,the principle of DRFM jammer is analyzed,and a new chaotic system is designed by improving the traditional Chebyshev chaotic mapping.Then,the Linear Frequency Modulated Continuous Wave (LFMCW) is modulated between pulses by using a new chaotic system,and an anti-DRFM spoofing signal is designed.Finally,the randomness and complexity of the improved chaotic mapping and the anti-interference performance of the designed signal are verified by simulation analysis.The simulation results show that the improved chaotic mapping has strong randomness and high complexity,and the designed signal has good anti-interference performance and anti-DRFM spoofing effect.