Automatic coiled material tensioning mechanism and coiled material winding system

The utility model relates to the field of coiled material production, and particularly discloses an automatic coiled material tensioning mechanism which comprises a first rack, and a fixed roller assembly, a bouncing roller assembly, a driving assembly, a transmission assembly, a guide rail assembly and a sensor assembly which are arranged on the first rack. The coiled material penetrates through the fixed roller assembly, the bouncing roller assembly and the sensor assembly; one end of the transmission assembly is connected with the driving assembly, and the other end is connected with the bouncing roller assembly; the driving assembly drives the transmission assembly according to a tension signal of the coiled material obtained by the sensor assembly and drives the bouncing roller assembly to move on the guide rail assembly in the vertical direction; the bouncing roller assembly completes automatic tensioning and loosening of the coiled material by getting close to and getting away from the fixed roller ass