A set of electromagnetic radiation measurement devices based on short-wave omnidirectional antennas and ultra-wideband omnidirectional antennas was designed to measure the electromagnetic radiation generated by TNT explosions, and the data was processed to obtain electromagnetic radiation characteristics.The results show that the explosive mass has a significant effect on the time domain characteristics of the electromagnetic radiation generated by the explosion. The greater the mass, the shorter the delayed response of the electromagnetic signal, the longer the duration, and the earlier the peak time. 60 kg TNT explosion generated electromagnetic radiation signal frequency is mainly concentrated below 100 MHz, the most concentrated energy is in the 0～50 MHz band, the explosive composition has the largest effect on the spectrum distribution, and the electromagnetic radiation spectrum distribution generated by different components of the explosive explosion has obvious specificity. Electromagnetic radiation intensity generated by dynamite explosion shows a strong correlation with the distance from the burst center. The intensity decreases with the distance increasing, and the magnitude of the decrease is large. Charge configuration and detonation mode will change the geometric movement pattern of the explosive during the explosion process, resulting in the non-uniformity characteristics of the explosion electromagnetic radiation propagation.