Alarm fire hydrant device

Provided is an alarm fire hydrant device, comprising a water release valve (1) and a fire-control connector (2); the water inlet connector (3) of the water release valve (1) is provided with an alarm device (4). The alarm device (4) comprises a float tank (5), a float (6), a first guide rod (7), a movable contact (8), a stationary contact (9), a switch box (10), a controller (11), a loudspeaker (12), and a warning lamp (13). When the fire hydrant has water, the controller (11) is in a state of non-alarm; when the fire hydrant has no water, the controller (11) is in a state of alarm, and the controller (11) controls the loudspeaker (12) and the warning lamp (13) to execute an alarm. The invention eliminates the risk of a fire hydrant having no water.