The invention discloses a retractable charging device which comprises a support, a rotary shaft, a winding reel, a lead screw, a lead screw nut, a lead screw guide rod and a charging line. The rotary shaft and the lead screw are rotationally installed on the support, the rotary shaft is parallel to the lead screw, a power transmission mechanism is further disposed between the rotary shaft and the lead screw, the winding reel is fixed to the rotary shaft, the lead screw guide rod is fixed to the support and parallel to the lead screw, the lead screw nut is screwed on the lead screw and penetrates through the lead screw guide rod in a sliding mode, a wire ring is further arranged on the lead screw nut, the charging line is wound on the winding reel, and the outer end of the charging line penetrates through the wire ring and is connected with a charging plug. By means of the retractable charging device, winding and unwinding are smoother, the charging line can not be twisted, the retractable charging device is very easy to operate, the charging line can be quickly wound and unwound, the situation that residents upstairs work hard to transport storage batteries is avoided, and the problems that the charging line is prone to dampness and aging, and safety hidden hazards are large are solved.