Fire hydrant cabinet back wall body and construction method thereof

The invention provides a fire hydrant cabinet back wall body and a construction method thereof. A wall body of a brick wall is provided with a reserved hole and a fire hydrant cabinet is embedded into the reserved hole; a plurality of concrete plates which are put from top to bottom are built on the rear face of the fire hydrant cabinet in the reserved hole and are anchored in the wall body of the brick wall by prefabricated steel in the concrete plates; the concrete plate at the uppermost part and a lintel plate are jacked and built; the concrete plate at bottommost part exceeds the bottom end of the fire hydrant cabinet body; the left and right ends of the concrete plates exceed the left and right sides of the fire hydrant cabinet body; transverse gaps between the concrete plates are staggered from transverse gaps between the brick wall; vertical gaps between the end parts of the concrete plates are staggered from vertical gaps between the side face of the fire hydrant cabinet and the wall body. According to the fire hydrant cabinet back wall body, the stability of the fire hydrant cabinet back wall body is better and steel wire nets are prevented from being fully hung; procedures are simple and the problem that brushing cracks are formed in the fire hydrant cabinet back wall body is solved.