Film rewinding machine

The invention discloses a film rewinding machine which comprises a base, a machine frame fixed to the two sides of the base and an unwinding device arranged on the machine frame, a tensioning roller is arranged on the right side of the unwinding device, a winding device is arranged on the right side of the tensioning roller, a drum unwinding slope is arranged above the winding device, a drum receiving device is arranged below the winding device, and a drum winding slope is arranged below the drum receiving device. The telescopic assembly controls the air expansion shaft to be inserted into the cylinder core from the two sides, the cylinder core is driven by the air expansion shaft to rotate, meanwhile, a second air outlet pipe is matched with a first air outlet pipe to enable a thin film to be attached to the cylinder core in a blowing mode for rewinding, after rewinding is completed, the thin film is cut off through a resistance wire, and then the thin film is cut off. According to the automatic rewinding ma