The utility model discloses a novel cubical switchboard gate interlock device, xiamen including load switch upper portion unit, interlocking board and cubical switchboard, load switch upper portion unit is provided with T type hole, the interlocking board set up in on the xiamen, it is outstanding to be provided with the T type on the interlocking board, T type salient can insert in the T type hole. The utility model provides a novel cubical switchboard gate interlock device can realize the interlocking of cubical switchboard xiamen and cubical switchboard load switch upper portion unit, the simple installation, and the dependable performance, the volume is less simultaneously, and processing is simple and convenient, and is with low costs.