A retractable power plug includes a housing having an opening formed therein, a mounting portion fixed in the housing, a plurality of pins, and a cover plate. The pins are rotatably mounted on the mounting portion. The cover plate at least partially cover the opening and defines a plurality of receiving grooves corresponding to the pins. The plurality of pins are configured in a first configuration and protrude out of the receiving grooves and in a second configuration to be within the plurality of receiving grooves. The cover plate further defines at least one recess on a sidewall of one of the plurality of receiving grooves, thereby enabling the pin to be retracted.