The utility model discloses a copper wire unreeling whipping prevention device of a cable winding cart round wire coil, which comprises two same semicircle cylinder bodies and a gemel, wherein, the two semicircle cylinder bodies are connected by the gemel, the gemel is composed of a hinge axis and two flaps matching with the outer walls of the semicircle cylinder bodies, and the semicircle cylinder bodies are respectively fixed on the two flaps to form a circular cylinder body which can be opened following the rotation of the two flaps. The copper wire unreeling whipping prevention device can solve the problem of a copper wire damaging an external paint film caused by striking an unreeling frame upright stanchion, and can lower the noise caused by whipping the copper wire.