The time-reversal electromagnetic waves have the characteristics of adaptive spatio-temporal focusing and super-resolution focusing in the near field and the far field.These characteristics enable the time-reversal electromagnetic waves to have great application prospects in super-resolution imaging, high-precision positioning, low-energy secure communication and so on.The research status of time reversal technology is summarized.In view of the development trend of electronic warfare, the technical advantages and application prospects of time-reversal electromagnetic waves in electronic countermeasure are analyzed, and the research emphasis in the next step is proposed.