The invention discloses a power cable take-up device which comprises a base fixedly provided with a weighing machine. A main frame is installed on a weighing table of the weighing machine. A rotating sleeve is rotationally installed on the main frame. Hinged swing arms are evenly and annularly arranged at the lower portion of the rotating sleeve. The middles of the swing arms are bent to the center of the rotating sleeve. A center shaft is inserted in the axial direction inside the rotating sleeve in a sliding and plugging mode. A conical block with the downward tip end is fixedly arranged at the lower end of the center shaft. Tracks corresponding to the swing arms are evenly distributed on the conical face of the conical block. An extending block extending towards the tracks is fixedly arranged in the middle of each swing arm. A matching piece which can only move along the tracks is installed at the end of each extending block. The main frame is provided with a main power device and a lifting device. A cutting device is further installed on the base. The power cable take-up device further comprises a starting and stopping device which controls the main power device and the lifting device to be started and stopped. Waste cables can be automatically bundled and wound, bundling is compact and easy, automatic and accurate weighing is performed, automatic material throwing is performed, the automatic degree is high, the power cable take-up device can be operated by one person, and operation is easy.