It can withstand the high-voltage arcs generated by short-circuit faults of cables and intermediate joints, thereby reducing the potential risks of harm to surrounding personnel caused by cable and intermediate joint accidents. It is suitable for fire protection of power supply lines with different voltages, especially in substations, subways, coal mines, tunnels, chemical or mining industries, communication machine rooms, as well as for cable fire protection of fire-fighting pipelines and large high-rise buildings.