The utility model discloses a wiring board with an abnormal power-failure alarm, comprising a shell, an external alternating-current power supply, a plurality of groups of sockets, an alternating-current circuit, a direct-current loop and a relay, wherein the relay is connected between a phase line and a zero line of the alternating-current circuit; the direct-current loop is connected with a battery pack and a buzzer in series by normally closed contacts output by the relay; and dual alarming switches are respectively arranged on the alternating-current circuit of the relay and the alarm direct-current loop. A safety fuse and a power switch are connected in series between the relay and the phase line. In the wiring board, the power of the buzzer is supplied by a group of batteries; and once the power of the wiring board fails, the relay actuates for operation, the direct-current loop is communicated, and the buzzer makes sound to inform a user of inspecting to eliminate faults and deliver power as fast as possible, i.e. when abnormal power failure occurs, alarming sound can be made, so that unnecessary loss can be avoided.