above-ground fire hydrant is set outside the building fire hose network water supply facilities, mainly for the fire truck to take water to extinguish fire, but also directly with the water hose, water gun connection to extinguish fire. It is one of the important fire fighting facilities. On the basis of common fire hydrant, the above-ground fire hydrant is improved in key parts to realize the characteristics of quick opening, pressure regulation, anti-freezing, anti-collision, etc. It is more practical and realizes the positive structure on pressure sealing, and has automatic water relief valve.