Winding and unwinding tensioning device

The utility model relates to a winding and unwinding tensioning device which comprises a fixing seat, a rotating shaft, a tensioning assembly and an adjusting assembly. The rotating shaft is rotatably arranged on the fixing seat, the tensioning assembly is provided with a connecting end rotatably connected to the rotating shaft and a tensioning end used for tensioning the coil stock, the adjusting assembly is slidably connected to the rotating shaft, and the adjusting assembly is in driving connection to the tensioning assembly so that the tensioning end can be away from the rotating shaft in the radial direction to tension the coil stock. The connecting end of the tensioning assembly can be driven by the adjusting assembly to rotate so that the tensioning end of the tensioning assembly can abut against the roll material all the time in the unwinding process, and therefore the roll material and the winding and unwinding tensioning device can be tightly connected, the uniformity of the unwinding speed can be k