Tensioning mechanism and cigarette making machine

The invention discloses a tensioning mechanism, which comprises a base, wherein a pin shaft is arranged in front of the base; a bearing sleeves the outside of the pin shaft; a tensioning wheel sleevesthe outside of the bearing; a cut tobacco suction belt to be tensioned is wound outside the tensioning wheel; an installing seat is arranged behind the base; guide rods and driving air cylinders arearranged vertically in parallel in a staggered way on the installing seat; the front ends of the guide rods are connected with the base; the back sections of the guide rods are arranged in an inner cavity of the installing seat through a linear bearing; the guide rods can drive the base and the tensioning wheel to slide in the linear bearing in the forward and backward directions; piston rods of the driving air cylinders are connected with the base; the cylinder bodies of the driving air cylinders are connected with the installing seat. The invention also discloses a cigarette making machine.The automatic regulation on