Rotary die-cutting machine

The utility model relates to the technical field of machining equipment, in particular to a rotary die-cutting machine, which can enable an upper knife roll to be automatically adjusted and driven, replace manual adjustment by screwing screws, reduce relative dislocation between a printing and pressing plate and a groove die, and perform die cutting on paperboards with different thicknesses. The operability and the working efficiency of the device are improved; comprising two sets of supporting plates, an upper knife roll and a lower die roll, the upper knife roll is rotationally installed between the two sets of supporting plates through a first rotating shaft, and the lower die roll is rotationally installed between the two sets of supporting plates through a second rotating shaft; a synchronous driving device, adjusting devices and a tensioning device are further included, the synchronous driving device is installed on the supporting plate, the upper knife roll and the lower die roll are synchronously driv