The utility model provides a prevent that mistake income from having electric spaced infrared alarm apparatus, it includes live display device and infrared alarm apparatus, live display device is including taking electric sensor, the control modul, electrified display element and relay, take electric sensor to set up in the cubical switchboard among the high voltage transmission lines, take electric sensor's output to be connected with control module's input, control module's output is continuous with the coil of electrified display element and relay respectively, the normally open contact of relay sets up in infrared alarm apparatus's supply circuit, infrared alarm apparatus includes infra -red transmitter, infrared receiver, control circuit and alarm, and infra -red transmitter and infrared receiver opposite direction set control two lateral walls in the cubical switchboard on, infrared receiver's level output end is connected with control circuit's level input, and the alarm is connected with control circuit's level output end. The utility model discloses utilize the infrared ray to block and take place the warning principle promptly, realize the mistake and go into to have electric interval to send the warning, organize the function that personnel got into.