Abstract: In order to accurately grasp the fire hazard performance of coal mine cable, the light transmittance of coal mine cable fire smoke, ignition time, peak heat release rate（ＰＨＲＲ）, total heat release（ＴＨＲ）, peak smoke generation rate（ＰＳＰＲ） and total smoke production（ＴＳＰ） under different thermal radiation intensity were measured by NBS smoke density test box and cone calorimeter, and then the fire hazard of coal mine cable was analyzed. The results show that the light transmission rate decreases rapidly, it is basically reduced to 0 at 130 s. Compared with coal mine cable at 30 kW/m², the PSPR, TSP, and arrival time of PSPR of coal mine cable at 35 kW/m² and 40 kW/m² are significantly reduced. With the increase of thermal radiation intensity, the PHRR of coal mine cable increased. The THR at 40 kW/m² is 1.99 and 2.43 times higher than that at 30 kW/m2 and 35 kW/m2. Besides, the greater the thermal radiation power is, the greater the fire risk of coal mine cable is.