Cable winding device capable of automatically winding and unwinding

The utility model relates to a cable winding device capable of automatically winding and unwinding, in particular to a cable winding device capable of automatically winding and unwinding a cable of a ground resistance tester, which aims to solve the problems that the cable of the ground resistance tester is poor in quality, short in length and difficult to arrange, and comprises a shell, a plurality of cables, a spring, a shaft and a wiring terminal; the shell is a rectangular shell; a shaft is installed between two opposite side faces in the rectangular shell in the length direction; the two ends of the shaft are fixedly connected with the centers of the two opposite side faces respectively; the spring is fixedly installed in the center of the outer surface of the shaft; the plurality of cables are arranged side by side and wound around the spring; first openings are arranged on the two vertically-arranged surfaces of the rectangular shell respectively; one end of each cable penetrates through the correspond