The invention provides a three-plug and discharging
power strip capable of being mutually locked, which comprises a shell, an input jack, an output jack, a key, a buckle, a PCB (
Printed Circuit Board), an overload protector, an input plug, a clamping groove, a
signal pin and a bottom cover, and is characterized in that the input jack is arranged in the left side of the upper end of the shell; output jacks are sequentially formed in the right side of the upper end of the shell; and a key is arranged on the left side of the middle position of the upper end of the shell. Through the arrangement of the shell, the input jack, the output jack, the keys, the buckle, the PCB, the overload protector, the input plug, the clamping groove and the
signal pin, the locking work is realized by clamping the buckle into the clamping groove in the use process, and the
signal pin arranged on the input plug is ensured to be in contact with the PCB through the locking of the buckle, so that the signal pin is prevented from being damaged. The device has an on-off function and a signal identification function which satisfies a discharging function of each output jack.