Fire pump coupling device is a fire fighting facility for high-rise buildings. Its function is to send fire water or other liquid fire extinguishing agents to the fire water supply system inside the building through the interface of the fire pump truck.Make the indoor fire hydrant or other fire extinguishing device inside the building to get sufficient pressure water source.It is used to extinguish the fire which cannot be on the floor, so as to solve the problem that the water of the indoor fire water supply system is low and the water supply is insufficient or unable to be supplied.It is made up of flanged pipe, elbow, check valve, drain valve, gate valve, fire interface, body and other components.Its installation type has the ground type, the underground type, the wall type.