The invention relates to an anti-electric shock protection-type power supply socket. The socket herein includes a power supply plug identifying apparatus, a control execution circuit and a working power supply circuit. The power supply plug identifying apparatus uses an optoelectronic coupler that has a light blocking groove to identify whether a PE terminal of the power supply socket is insertedby a pin of the power supply plug. When the power supply socket is not plugged with the power supply plug of an electrical appliance, the terminal of the power supply socket is not energized, and onlywhen the power supply socket is plugged with power supply plug, the terminal of the power supply socket produces normal power output so as to provide protection. The structure and theory of the powersupply plug identifying apparatus and the anti-electric shock protection type power supply socket circuit graph are shown as in the draws of the abstract.