Fire water supply device

The utility model relates to the technical field of fire water supply, in particular to a fire water supply device which comprises an air pressure tank, a supporting rod is fixedly connected to the bottom of the air pressure tank, a bottom plate is fixedly connected to the bottom of the supporting rod, a protective plate is in clearance fit with the outer wall of the air pressure tank, and a pressure gauge is installed on one side of the top of the air pressure tank. A transverse plate is fixedly connected to the lower portion of the outer wall of the pressure gauge, and a cleaning structure is arranged above the transverse plate. Through cooperation of an air pressure tank, a supporting rod, a bottom plate, a vertical plate, a transverse block, a protection plate, a vertical block, a pressure gauge, a transverse plate and a cleaning structure, a straight plate is pulled downwards, the straight plate drives a wiping plate to move downwards, wiping cloth wipes off dust and impurities on the surface of the pres