The utility model discloses a distribution cabinet housing voltage detecting alarm device, including analog input circuit, AD converting circuit, voltage comparator circuit, alarm, stator indicator and power supply circuit. The utility model discloses mainly an electric leakage voltage detection device is installed to the technique on the switch board, requires a comparator output control voltage when input voltage is greater than reference voltage 24V, make 500 of oscillation circuit production 1000Hz's signal sends the chimes of doom through power amplifier circuit by loudspeaker, and emitting diode is luminous simultaneously reports to the police. Excessive pressure alarm circuit comprises oscillator circuit, power amplifier circuit, voltage comparator circuit and control circuit 4 part. To such an extent as to can timely notice device management person find out and handle reason, the effectual emergence that prevents the electric shock accidents.