Based on this principle, the existing fire-fighting bombs are mainly divided into sand and stone fire-fighting bombs and dry powder fire-fighting bombs. "Fire-fighting bombs" are divided into three types: large, medium and small, and the small coverage area is about 20㎡, and the effect is ideal. Their main materials have no toxic pollution to the environment, and there is no discharge of polluted air, sewage and dirt in the production process. When they explode, they will not harm people, buildings and other furniture and equipment, but only put out the fire source. It is suitable for fire fighting in homes, institutions, schools, shops, entertainment places, warehouses, docks, vehicles, tires, airplanes and forests. If the fire is too big and the oil tank explodes to cause a fire, you can use medium and large "incendiary bombs". It is portable and has no auxiliary equipment, so it can put out the fire quickly. When not in use, it can be placed in a proper place. When the fire source is burning the projectile, it can automatically detonate to extinguish the fire, and control the rapid expansion of the fire source in time, which is conducive to gaining more time and reducing losses.