Rotary cutting device for cutting cigarette paper boards

The invention discloses a rotary cutting device for cutting cigarette carton paperboards, which comprises a rotary part, a plurality of clamping parts, a supporting part, a first driving piece and a second driving piece, the clamping parts are used for clamping paperboards, the fixed ends of the clamping parts are fixed at the outer end of the rotary part, and the rotary part is used for clampingthe paperboards. The output end of the first driving piece is connected with the wheel rotating part so as to drive the multiple clamping parts on the wheel rotating part to move along a first set path; a supporting face is formed in the supporting portion, the output end of the second driving piece is connected with the supporting portion so as to drive the supporting portion to move along a second set path, and when the supporting portion moves to the preset position of the second set path, the supporting face supports a paperboard on one of the multiple clamping portions. Compared with theprior art, the efficiency