A charging dock includes a base, a charging cable and a retractable wire reel module received in the base. A wall of the base is concaved downward to form a charging space including an opening in a cavity of the base. The charging cable includes a power wire, a charging and a power connector interfaces. The charging interface is received in the base. The power interface is positioned out of the base. The retractable wire reel module includes a guiding shaft positioned, a coil spring member and a sleeve member. The sleeve member rotatably sleeves on the guiding shaft via the coil spring member. The power wire is wound on the sleeve member, the coil spring member is connected with the guiding shaft and the sleeve member. The power wire retracts in the base via the sleeve member driven to rotate by the coil spring member.