Abstract: Abstract: Fire monitors were the key equipment for fighting fire of large tanks. It was necessary to carry out research on the fire-extinguishing performance of fire monitors based on the large-scale simulated oil tank fire test. Based on the screening of fire monitors and foam extinguishing agents commonly used by fire rescue teams, the type of foam extinguishing agent suitable for fire monitors was selected through the fire monitor spray test combining different types of foam extinguishing agents, and fire-extinguishing performance of the fire monitor were further evaluated through the large-scale simulated oil tank fire test. The test results showed that the spray performance of fire monitors, fire extinguishing performance of foam extinguishing agent and fire extinguishing tactics were the key factors that affect the fire extinguishing performance of fire monitors, and guiding suggestions for fire rescue teams in terms of fire fighting equipment and fire monitor techniques and tactics were provided.

Key words: Key words: fire monitor, spray performance, full scale fire, technique and tactic