The utility model relates to a cubical switchboard and handle hole plug -hole device thereof. The cubical switchboard includes the cabinet body, and the cabinet is equipped with the handle hole on personally experiencing sth. Part of the body, is equipped with the plug -hole device on the handle hole, the plug -hole device to the gate including being used for sealing up a door of shutoff handle hole, is equipped with lock or padlock structure on the gate. Compared with the prior art, the utility model discloses a cubical switchboard has set up in the handle hole department of its cabinet body sealing up a door, sealing up a door and adopted the gate form and be equipped with the lock on it or the padlock structure, consequently, when using, the accessible lock perhaps comes the locking of sealing up a door at the structural padlock of padlock to but one side prevent misuse, the purpose of reliable shutoff handle hole is played in sealing up a door of on the other hand accessible bar gate type, and then has solved the poor problem of security that current cubical switchboard arouses owing to handle hole plug -hole device reliability difference.