Fire extinguishers are the most common fire-fighting equipment, so we need to be familiar with what items and standards need to be checked for fire extinguishers to ensure that the fire extinguishers can be used normally. What items should be checked for fire extinguishers? Fire extinguishers should comply with market access regulations, and should have factory certificates and related certificates. The nameplate, production date and maintenance date of the fire extinguisher should be complete. The type, specification, level and quantity of fire extinguishers shall meet the requirements of the planting design. The fire extinguisher bottle should have no obvious defects and mechanical damage. The safety device of the fire extinguisher should be intact. 1. The pointer of the fire extinguisher pressure indicator should be within the green zone. The extinguisher pressure is too low (more than 10% weight loss of CO2 extinguisher) and must be refilled.2. If the lead seal of ABC dry powder fire extinguisher is damaged, it must be refilled.3. The interface between the fire extinguisher bottle and the horn must be tightened, and the fire extinguisher bottle and horn must not be damaged.4. Keep the fire extinguisher clean as a whole (according to the situation on site).5. Configure fire extinguishers according to the site conditions (according to the number of fire extinguishers, fire extinguisher types, fire extinguisher models, etc.).6. The fire extinguisher should be place