The use of fire extinguishers is divided into four steps are lift, pull, aim, pressure. "Lift" refers to the portable fire extinguisher handle, so that the fire extinguisher to maintain a horizontal vertical state, "pull" refers to pull out the fire extinguisher safety pin, "aim" refers to the fire extinguisher nozzle aiming at the fire source, "pressure" refers to the fire extinguisher. "Press" means to press the switch of the fire extinguisher, let the fire extinguisher spray dry powder to extinguish the fire.

The fire extinguisher is a portable fire extinguishing tool, is one of the common fire prevention facilities, the world's first fire extinguishers were born in London in 1834, invented by George William Manby. Fire extinguishers are stored in public places or places where fires may occur, divided into portable, trolley-type and other different types, different types of fire extinguishers filled with different ingredients, is designed for different fire causes, including foam, dry powder, halogenated alkanes and so on. Fire extinguishers placed, should be kept dry and ventilated, to prevent the cylinder from moisture corrosion. Should avoid sun exposure and strong radiant heat, so as not to affect the normal use of fire extinguishers.