The invention discloses a heat emission defect electrified treatment device with a locking device, which comprises an upper layer metal frame and a lower layer metal frame. The upper layer metal frameis provided with a clamping device, the lower layer metal frame is provided with a locking device, the locking device can make the clamping device loosen/clamp, and the bottom end of the locking device is provided with a connector which can be connected with an insulating rod. The device has the advantages of safety, reliability and convenience in use, and can be used for quick emergency treatment of electric current-induced heat emission type defects, thereby preventing equipment from being burned out and power failure caused by high-temperature heat emission. The device has a compact structure, is convenient to use and is fast, and is suitable for being widely popularized in the technical field.