Abstract: The present invention discloses a power supply wire receiving structure comprising a cable take-up unit and a charging wire. The charging wire is applicable to an electronic device and made of bullet-proof material so as to have high tensile strength. The charging wire is flat-shaped so that it is easy to be received in the cable take-up unit. The combination of the charging wire and the cable take-up unit enables the charging wire to be received in the cable take-up unit and facilitates the arrangement of the wire. Furthermore, the cable take-up unit can be coupled to a charging unit which has an accommodating groove so that the cable take-up unit is received in the accommodating groove of charging unit to reduce the product volume and be easy to carry.