Alarm fire hydrant

The utility model discloses an alarm fire hydrant which comprises a fire hydrant body, water outlet pipes which are symmetrically distributed are fixedly connected to the two sides of the fire hydrant body, branch pipes are arranged below the water outlet pipes, and a connecting pipe is fixedly connected to one end of each branch pipe. Then water is shunted into the vertical pipe and the early warning pipe, the water enters the vertical pipe to enable the pressure gauge to perform pressure detection, the water enters the early warning pipe to enable the transverse plate to move upwards, then the movable column is driven to move, the spring deforms, the movable column enables the trigger plate to move upwards, and when the pressure gauge reaches the detection limit or the ultimate pressure in the fire hydrant body, the trigger plate stops moving. The trigger plate makes contact with the trigger switch to enable the alarm to give an alarm, the situation that the fire hydrant body is damaged due to too large pre